fix: resolve CI database connection issues

- Fix .env file location for Django in CI (app/.env instead of .env)
- Add PostgreSQL client tools installation
- Add proper PostgreSQL service configuration with ports
- Add Redis port mapping for proper service access
- Add wait step to ensure PostgreSQL is ready before migrations
- Fix environment variable handling in GitHub Actions

.github/workflows/ci-cd.yml

@@ -18,8 +18,11 @@ jobs:
       postgres:
         image: postgres:15
         env:
+          POSTGRES_USER: postgres
           POSTGRES_PASSWORD: postgres
           POSTGRES_DB: test_stiftung
+        ports:
+          - 5432:5432
         options: >-
           --health-cmd pg_isready
           --health-interval 10s
@@ -28,6 +31,8 @@ jobs:
       
       redis:
         image: redis:7-alpine
+        ports:
+          - 6379:6379
         options: >-
           --health-cmd "redis-cli ping"
           --health-interval 10s
@@ -52,12 +57,15 @@ jobs:
     
     - name: Install dependencies
       run: |
+        sudo apt-get update
+        sudo apt-get install -y postgresql-client
         python -m pip install --upgrade pip
         pip install -r app/requirements.txt
     
     - name: Set up environment
       run: |
-        cp env-template.txt .env
+        cp env-template.txt app/.env
+        cd app
         echo "DJANGO_DEBUG=1" >> .env
         echo "DJANGO_SECRET_KEY=test-secret-key-for-ci" >> .env
         echo "POSTGRES_DB=test_stiftung" >> .env
@@ -67,6 +75,14 @@ jobs:
         echo "DB_PORT=5432" >> .env
         echo "REDIS_URL=redis://localhost:6379/0" >> .env
     
+    - name: Wait for PostgreSQL
+      run: |
+        while ! pg_isready -h localhost -p 5432 -U postgres; do
+          echo "Waiting for PostgreSQL..."
+          sleep 2
+        done
+        echo "PostgreSQL is ready!"
+    
     - name: Run migrations
       working-directory: ./app
       env: