Add installation command (#3)

.github/workflows/ci.yml

@@ -1,43 +0,0 @@
-name: Postgres Best Practices CI
-
-on:
-  push:
-    branches: [main]
-    paths:
-      - 'skills/postgres-best-practices/**'
-      - 'packages/postgres-best-practices-build/**'
-  pull_request:
-    paths:
-      - 'skills/postgres-best-practices/**'
-      - 'packages/postgres-best-practices-build/**'
-
-jobs:
-  validate-and-build:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: actions/setup-node@v4
-        with:
-          node-version: '20'
-
-      - name: Install dependencies
-        working-directory: packages/postgres-best-practices-build
-        run: npm install
-
-      - name: Validate rule files
-        working-directory: packages/postgres-best-practices-build
-        run: npm run validate
-
-      - name: Build AGENTS.md
-        working-directory: packages/postgres-best-practices-build
-        run: npm run build
-
-      - name: Check for uncommitted changes
-        run: |
-          if [[ -n $(git status --porcelain skills/postgres-best-practices/AGENTS.md) ]]; then
-            echo "Error: AGENTS.md is not up to date"
-            echo "Run 'npm run build' and commit the changes"
-            git diff skills/postgres-best-practices/AGENTS.md
-            exit 1
-          fi