fix yarn setup, setup prettier w/ astro

Author: gildesmarais

.github/workflows/lint.yml

@@ -19,10 +19,10 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: "24"
-          cache: "yarn"
+          cache: "npm"
 
       - name: Install dependencies
-        run: yarn install --frozen-lockfile
+        run: npm ci
 
       - name: Run linters
-        run: yarn lint
+        run: npm run lint

.prettierignore

@@ -1,3 +1,3 @@
 _site
 node_modules
-yarn.lock
+package-lock.json

.prettierrc.json

@@ -1,4 +1,13 @@
 {
   "singleQuote": false,
-  "trailingComma": "all"
+  "trailingComma": "all",
+  "plugins": ["prettier-plugin-astro"],
+  "overrides": [
+    {
+      "files": "*.astro",
+      "options": {
+        "parser": "astro"
+      }
+    }
+  ]
 }

.stylelintrc.json

@@ -1,16 +1,16 @@
 default: setup clean lintfix serve
 
 setup:
-	yarn check || yarn
+	npm ci
 	bundle check || bundle
 	make update
 
 lint:
-	yarn lint
+	npm run lint
 	make lint-ruby
 
 lintfix:
-	yarn lintfix
+	npm run lintfix
 	make lintfix-ruby
 
 lint-ruby:

Makefile

@@ -9,12 +9,17 @@
     "preview": "astro preview",
     "astro": "astro",
     "update-data": "ruby bin/data-update",
-    "build:full": "npm run update-data && npm run build"
+    "build:full": "npm run update-data && npm run build",
+    "lint": "prettier --check 'src/**/*.{astro,js,ts,jsx,tsx,css,scss,md,mdx}'",
+    "lintfix": "prettier --write 'src/**/*.{astro,js,ts,jsx,tsx,css,scss,md,mdx}'"
   },
   "dependencies": {
     "@astrojs/starlight": "^0.35.3",
     "astro": "^5.6.1",
     "sharp": "^0.34.2"
   },
-  "devDependencies": {}
+  "devDependencies": {
+    "prettier": "^3.0.0",
+    "prettier-plugin-astro": "^0.14.0"
+  }
 }