Meta: add stylelint with config

.gitignore

@@ -19,3 +19,4 @@ hugo.linux
 # End of https://www.toptal.com/developers/gitignore/api/hugo
 
 data/
+/node_modules/

.stylelintignore

@@ -0,0 +1,3 @@
+static/
+public/
+data/

.stylelintrc.json

@@ -0,0 +1,14 @@
+{
+  "extends": [
+    "stylelint-config-standard-scss",
+    "stylelint-stylistic/config"
+  ],
+  "plugins": [
+    "stylelint-scss",
+    "stylelint-stylistic"
+  ],
+  "rules": {
+    "media-feature-range-notation": "prefix",
+    "stylistic/max-empty-lines": 2
+  }
+}

CONTRIBUTING.md

@@ -24,3 +24,18 @@ Examples:
 
 - `[TIDY] CI: Move common parts to own job`
 - `Style: Make navbar sticky`
+
+## Style guide
+We use stylelint to lint the (s)css, please run before you commit
+```shell
+(p)npm lint-fix
+```
+### Who to setup
+We would recommend using pnpm. [Install Guide](https://pnpm.io/installation)
+```shell
+pnpm i
+``` 
+You can also use npm if you want
+```shell
+npm i
+```

package.json

@@ -0,0 +1,13 @@
+{
+  "devDependencies": {
+    "stylelint": "^15.11.0",
+    "stylelint-codeguide": "^0.3.2",
+    "stylelint-config-standard-scss": "^11.0.0",
+    "stylelint-scss": "^5.3.0",
+    "stylelint-stylistic": "^0.4.3"
+  },
+  "scripts": {
+    "lint": "stylelint '**/*.scss' '**/*.css'",
+    "lint-fix": "stylelint '**/*.scss' '**/*.css' --fix"
+  }
+}