add prettier requirements and commands,

add prettier ADR,
add prettier action

.github/workflows/prettier.yml

@@ -0,0 +1,29 @@
+name: Prettier
+
+on:
+  pull_request:
+    branches:
+    - main
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  # Single deploy job since we're just deploying
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install apt updates
+        run: sudo apt -y update; sudo apt -y upgrade;
+      - name: Install prerequisites
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install dependencies
+        run: sudo npm install
+      - name: Start local http server
+        run: sudo npm run http-server & 
+      - name: Run tests
+        run: sudo npm lint-prettier