diff --git a/.eslintrc.js b/.eslintrc.js
index 5004e26..85f98ec 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -4,38 +4,42 @@ module.exports = {
         'commonjs': true,
         'es2021': true,
         'node': true,
-        'jest/globals': true
+        'jest/globals': true,
     },
     'extends': ['eslint:recommended', 'plugin:jest/recommended'],
     'parserOptions': {
-        'ecmaVersion': 12
+        'ecmaVersion': 12,
     },
     'rules': {
         'indent': [
             'error',
-            4
+            4,
         ],
         'linebreak-style': [
             'error',
-            'unix'
+            'unix',
         ],
         'quotes': [
             'error',
-            'single'
+            'single',
         ],
         'semi': [
             'error',
-            'always'
+            'always',
         ],
         'curly': [
             'error',
-            'all'
+            'all',
         ],
         'brace-style': [
             'error',
-            '1tbs'
+            '1tbs',
         ],
         'jest/no-done-callback': 'off',
-        'jest/expect-expect': 'off'
-    }
+        'jest/expect-expect': 'off',
+        'comma-dangle': [
+            'error',
+            'always-multiline',
+        ],
+    },
 };
diff --git a/src/app.js b/src/app.js
index 6ae48e6..0459650 100644
--- a/src/app.js
+++ b/src/app.js
@@ -93,7 +93,7 @@ module.exports = (config) => {
             host: host,
             version: pjson.version,
             request: req,
-            config: config
+            config: config,
         };
         res.render(vPath, data, (err, html) => {
             if (err && vPath !== path.join(config['data_dir'], config['home']['error'])) {
@@ -130,7 +130,7 @@ module.exports = (config) => {
     //rate limit for safer server
     const limiter = rateLimit({
         windowMs: 15 * 60 * 1000, // 15 minutes
-        max: config['rate_limit']
+        max: config['rate_limit'],
     });
     app.use(limiter);
 
@@ -174,7 +174,7 @@ module.exports = (config) => {
                     'title': config['rss']['title'],
                     'description': config['rss']['description'],
                     'feed_url': host + req.url,
-                    'site_url': host
+                    'site_url': host,
                 });
                 Object.values(articles)
                     .slice(0, config['rss']['length'])
@@ -182,7 +182,7 @@ module.exports = (config) => {
                         feed.item({
                             title: article.title,
                             url: host + article.url,
-                            date: article.date
+                            date: article.date,
                         });
                     });
                 lastRSS = feed.xml();
diff --git a/src/file_walker.js b/src/file_walker.js
index 22feb2f..4a397ca 100644
--- a/src/file_walker.js
+++ b/src/file_walker.js
@@ -92,7 +92,7 @@ module.exports = (config) => {
                         realPath: path.join(config['data_dir'], p[0], p[1], p[2], p[3]),
                         year: parseInt(p[0]),
                         month: parseInt(p[1]),
-                        day: parseInt(p[2])
+                        day: parseInt(p[2]),
                     };
                     article.date = new Date(article.year, article.month, article.day);
                     article.date.setUTCHours(0);
@@ -116,6 +116,6 @@ module.exports = (config) => {
                 });
 
             });
-        }
+        },
     };
 };
\ No newline at end of file
diff --git a/src/renderer.js b/src/renderer.js
index c059204..bd197cc 100644
--- a/src/renderer.js
+++ b/src/renderer.js
@@ -112,9 +112,9 @@ module.exports = (config) => {
             MathJax: {
                 tex2jax: {
                     inlineMath: [['$', '$']],
-                    displayMath: [['$$', '$$']]
-                }
-            }
+                    displayMath: [['$$', '$$']],
+                },
+            },
         });
     }
 
@@ -131,7 +131,7 @@ module.exports = (config) => {
             const mjConf = {
                 math: eq,
                 format: format,
-                speakText: config['mathjax']['speak_text']
+                speakText: config['mathjax']['speak_text'],
             };
             mjConf[output] = true;
             mjAPI.typeset(mjConf, (res) => {
@@ -222,7 +222,7 @@ module.exports = (config) => {
                     });
                 });
             });
-        }
+        },
     };
 };
 
diff --git a/test/app.test.js b/test/app.test.js
index ec5599b..590172b 100644
--- a/test/app.test.js
+++ b/test/app.test.js
@@ -163,7 +163,7 @@ describe('Test root path', () => {
         utils.createEmptyDirs([
             path.join(dataDir, '2019', '05', '05'),
             path.join(dataDir, '2018', '05', '05'),
-            path.join(dataDir, '2017', '05', '05')
+            path.join(dataDir, '2017', '05', '05'),
         ]);
         utils.createEmptyFiles([
             path.join(dataDir, '2019', '05', '05', 'draft.md'),
@@ -219,11 +219,11 @@ describe('Test RSS feed', () => {
     test('200 2 rss items', (done, fail) => {
         utils.createEmptyDirs([
             path.join(dataDir, '2019', '05', '05'),
-            path.join(dataDir, '2018', '05', '05')
+            path.join(dataDir, '2018', '05', '05'),
         ]);
         utils.createEmptyFiles([
             path.join(dataDir, '2019', '05', '05', 'index.md'),
-            path.join(dataDir, '2018', '05', '05', 'index.md')
+            path.join(dataDir, '2018', '05', '05', 'index.md'),
         ]);
         app.reload(() => {
             request(app).get('/rsstest').then((response) => {
@@ -238,12 +238,12 @@ describe('Test RSS feed', () => {
         utils.createEmptyDirs([
             path.join(dataDir, '2019', '05', '05'),
             path.join(dataDir, '2018', '05', '05'),
-            path.join(dataDir, '2017', '05', '05')
+            path.join(dataDir, '2017', '05', '05'),
         ]);
         utils.createEmptyFiles([
             path.join(dataDir, '2019', '05', '05', 'index.md'),
             path.join(dataDir, '2018', '05', '05', 'index.md'),
-            path.join(dataDir, '2017', '05', '05', 'index.md')
+            path.join(dataDir, '2017', '05', '05', 'index.md'),
         ]);
         app.reload(() => {
             request(app).get('/rsstest').then((response) => {
@@ -265,10 +265,10 @@ describe('Test webhook', () => {
         });
     });
     test('200 no secret', (done) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         utils.createEmptyFiles([
             path.join(dataDir, '2019', '05', '05', 'index.md'),
-            path.join(dataDir, testTemplate)
+            path.join(dataDir, testTemplate),
         ]);
         config['webhook']['pull_command'] = 'git --help';
         request(app).post('/webhooktest').then((response) => {
@@ -280,10 +280,10 @@ describe('Test webhook', () => {
         });
     });
     test('500 command failed', (done) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         utils.createEmptyFiles([
             path.join(dataDir, '2019', '05', '05', 'index.md'),
-            path.join(dataDir, testTemplate)
+            path.join(dataDir, testTemplate),
         ]);
         config['webhook']['pull_command'] = 'qzgfqgqz';
         request(app).post('/webhooktest').then((response) => {
@@ -322,7 +322,7 @@ describe('Test articles rendering', () => {
     });
 
     test('500 fail to render', (done, fail) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         fs.writeFileSync(path.join(dataDir, '2019', '05', '05', 'index.md'), '# Hello');
         fs.writeFileSync(path.join(dataDir, testTemplate), '<%- articl.content %><%- `<a href="${article.url}">reload</a>` %>');
         app.reload(() => {
@@ -334,7 +334,7 @@ describe('Test articles rendering', () => {
     });
 
     test('500 no template', (done, fail) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         fs.writeFileSync(path.join(dataDir, '2019', '05', '05', 'index.md'), '# Hello');
         app.reload(() => {
             request(app).get('/2019/05/05/hello/').then((response) => {
@@ -345,7 +345,7 @@ describe('Test articles rendering', () => {
     });
 
     test('200 rendered article', (done, fail) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         fs.writeFileSync(path.join(dataDir, '2019', '05', '05', 'index.md'), '# Hello');
         fs.writeFileSync(path.join(dataDir, testTemplate), '<%- article.content %><%- `<a href="${article.url}">reload</a>` %>');
         app.reload(() => {
@@ -358,7 +358,7 @@ describe('Test articles rendering', () => {
     });
 
     test('200 rendered draft', (done, fail) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         fs.writeFileSync(path.join(dataDir, '2019', '05', '05', 'draft.md'), '# Hello');
         fs.writeFileSync(path.join(dataDir, testTemplate), '<%- article.content %><%- `<a href="${article.url}">reload</a>` %>');
         app.reload(() => {
@@ -371,10 +371,10 @@ describe('Test articles rendering', () => {
     });
 
     test('200 other url', (done, fail) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         utils.createEmptyFiles([
             path.join(dataDir, '2019', '05', '05', 'index.md'),
-            path.join(dataDir, testTemplate)
+            path.join(dataDir, testTemplate),
         ]);
         app.reload(() => {
             request(app).get('/2019/05/05/anything/').then((response) => {
@@ -385,10 +385,10 @@ describe('Test articles rendering', () => {
     });
 
     test('200 other url 2', (done, fail) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         utils.createEmptyFiles([
             path.join(dataDir, '2019', '05', '05', 'index.md'),
-            path.join(dataDir, testTemplate)
+            path.join(dataDir, testTemplate),
         ]);
         app.reload(() => {
             request(app).get('/2019/05/05/').then((response) => {
@@ -441,7 +441,7 @@ describe('Test static files', () => {
         });
     });
     test('200 valid resource of article', (done) => {
-        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05'),]);
+        utils.createEmptyDirs([path.join(dataDir, '2019', '05', '05')]);
         fs.writeFileSync(path.join(dataDir, '2019', '05', '05', 'somefile.txt'), 'filecontent');
         request(app).get('/2019/05/05/title/somefile.txt').then((response) => {
             expect(response.statusCode).toBe(200);
diff --git a/test/file_walker.test.js b/test/file_walker.test.js
index 109de43..bd9c244 100644
--- a/test/file_walker.test.js
+++ b/test/file_walker.test.js
@@ -15,8 +15,8 @@ const config = {
         'draft': 'draft.md',
         'default_title': 'Untitled',
         'default_thumbnail': 'default.png',
-        'thumbnail_tag': 'thumbnail'
-    }
+        'thumbnail_tag': 'thumbnail',
+    },
 };
 
 const fw = require('../src/file_walker')(config);
@@ -46,7 +46,7 @@ describe('Test function fileTree', () => {
         utils.createEmptyDirs([
             path.join(dataDir, 'test', 'test'),
             path.join(dataDir, 'test', 'test2'),
-            path.join(dataDir, 'test2')
+            path.join(dataDir, 'test2'),
         ]);
         fw.fileTree(dataDir, (err, list) => {
             expect(err).toBeNull();
@@ -58,7 +58,7 @@ describe('Test function fileTree', () => {
     test('simple files', (done) => {
         const fileList = [
             path.join(dataDir, 'f1.txt'),
-            path.join(dataDir, 'f2.txt')
+            path.join(dataDir, 'f2.txt'),
         ];
         utils.createEmptyFiles(fileList);
         fw.fileTree(dataDir, (err, list) => {
@@ -72,13 +72,13 @@ describe('Test function fileTree', () => {
     test('nested files', (done) => {
         utils.createEmptyDirs([
             path.join(dataDir, 'test', 'test'),
-            path.join(dataDir, 'test2')
+            path.join(dataDir, 'test2'),
         ]);
         const fileList = [
             path.join(dataDir, 'f1.txt'),
             path.join(dataDir, 'test', 'f2.txt'),
             path.join(dataDir, 'test', 'test', 'f3.txt'),
-            path.join(dataDir, 'test2', 'f4.txt')
+            path.join(dataDir, 'test2', 'f4.txt'),
         ];
         utils.createEmptyFiles(fileList);
         fw.fileTree(dataDir, (err, list) => {
@@ -120,7 +120,7 @@ describe('Test index article reading', () => {
             expect(err).toBeNull();
             expect(info).toEqual({
                 title: 'This is an awesome title !?¤',
-                thumbnail: './thumbnail.jpg'
+                thumbnail: './thumbnail.jpg',
             });
             done();
         });
@@ -136,7 +136,7 @@ describe('Test index article reading', () => {
             expect(err).toBeNull();
             expect(info).toEqual({
                 title: undefined,
-                thumbnail: './thumbnail.jpg'
+                thumbnail: './thumbnail.jpg',
             });
             done();
         });
@@ -148,7 +148,7 @@ describe('Test index article reading', () => {
             expect(err).toBeNull();
             expect(info).toEqual({
                 title: 'title',
-                thumbnail: undefined
+                thumbnail: undefined,
             });
             done();
         });
@@ -164,7 +164,7 @@ describe('Test index article reading', () => {
             expect(err).toBeNull();
             expect(info).toEqual({
                 title: 'This is an awesome title !?¤',
-                thumbnail: undefined
+                thumbnail: undefined,
             });
             done();
         });
@@ -181,7 +181,7 @@ describe('Test index article reading', () => {
             expect(err).toBeNull();
             expect(info).toEqual({
                 title: 'This is an awesome title !?¤',
-                thumbnail: './thumbnail.jpg'
+                thumbnail: './thumbnail.jpg',
             });
             done();
         });
@@ -208,12 +208,12 @@ describe('Test article fetching', () => {
     test('misplaced index file', (done) => {
         utils.createEmptyDirs([
             path.join(dataDir, 'test', 'test'),
-            path.join(dataDir, '2019', '05', '05')
+            path.join(dataDir, '2019', '05', '05'),
         ]);
         utils.createEmptyFiles([
             path.join(dataDir, testIndex),
             path.join(dataDir, 'test', 'test', testIndex),
-            path.join(dataDir, '2019', '05', testIndex)
+            path.join(dataDir, '2019', '05', testIndex),
         ]);
         fw.fetchArticles((err, dict) => {
             expect(err).toBeNull();
diff --git a/test/renderer.test.js b/test/renderer.test.js
index ea629c1..9cd8711 100644
--- a/test/renderer.test.js
+++ b/test/renderer.test.js
@@ -15,15 +15,15 @@ const config = {
     },
     'showdown': {
         'simplifiedAutoLink': true,
-        'smartIndentationFix': true
+        'smartIndentationFix': true,
     },
     'mathjax': {
         'output_format': 'html',
-        'speak_text': false
+        'speak_text': false,
     },
     'plantuml': {
-        'output_format': 'svg'
-    }
+        'output_format': 'svg',
+    },
 };
 
 const renderer = require('../src/renderer')(config);
@@ -48,7 +48,7 @@ describe('get parts', () => {
         const data = 'Hello\nthere\ngeneral\nkenobi';
         const parts = renderer.getParts(data);
         expect(parts.map(p => p.text)).toEqual([
-            'Hello\nthere\ngeneral\nkenobi'
+            'Hello\nthere\ngeneral\nkenobi',
         ]);
     });
     test('lot of stuff', () => {
@@ -58,27 +58,27 @@ describe('get parts', () => {
             {
                 index: 0,
                 end: 12,
-                text: 'Hello\nthere\n'
+                text: 'Hello\nthere\n',
             },
             {
                 index: 22,
                 end: 30,
-                text: '\ngeneral'
+                text: '\ngeneral',
             },
             {
                 index: 53,
                 end: 54,
-                text: '\n'
+                text: '\n',
             },
             {
                 index: 78,
                 end: 79,
-                text: '\n'
+                text: '\n',
             },
             {
                 index: 109,
                 end: 115,
-                text: 'kenobi'
+                text: 'kenobi',
             },
         ]);
     });