feat: add CI

.github/workflows/ci.yml

@@ -0,0 +1,42 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    timeout-minutes: 15
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - uses: amplium/git-crypt-action@master
+        with:
+          key_encoded: ${{ secrets.DECRYPTION_SECRET }}
+
+      - run: npm run lint:quiet
+
+  prettier:
+    runs-on: ubuntu-latest
+
+    timeout-minutes: 15
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - uses: amplium/git-crypt-action@master
+        with:
+          key_encoded: ${{ secrets.DECRYPTION_SECRET }}
+
+      - run: npm run prettier:check      -

package.json

@@ -25,7 +25,9 @@
   "scripts": {
     "start-booker": "node add-to-cart.mjs",
     "start-checker": "node check-for-changes.mjs",
+    "prettier:check": "prettier --check .",
     "prettier:write": "prettier --write .",
+    "lint:quiet": "npm run lint -- --quiet",
     "eslint:fix": "eslint . --ignore-path .gitignore --ext .mjs,.js --fix"
   }
 }