Improve examples

examples/cakephp-postgres.yml

@@ -8,6 +8,8 @@ jobs:
       matrix:
         php-versions: ['7.4', '8.0', '8.1']
     runs-on: ubuntu-latest
+
+    # Docs: https://docs.github.com/en/actions/using-containerized-services
     services:
       postgres:
         image: postgres:latest
@@ -38,6 +40,11 @@ jobs:
           extensions: mbstring, intl, redis, pdo_pgsql
           coverage: pcov
 
+      # Local PostgreSQL service in GitHub hosted environments is disabled by default.
+      # If you are using it instead of service containers, make sure you start it.
+      # - name: Start postgresql service
+      #   run: sudo systemctl start postgresql.service
+
       - name: Get composer cache directory
         id: composer-cache
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
@@ -103,6 +110,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
+      # Docs: https://github.com/shivammathur/setup-php
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with: