Add .env.example file and update docker-compose configurations for environment variables

.gitea/workflows/deploy-dev.yml

@@ -60,6 +60,7 @@ jobs:
         env:
           DEPLOY_USER: ${{ secrets.DEPLOY_USER }}
           DEPLOY_HOST: ${{ secrets.DEPLOY_HOST }}
+
         run: |
           ssh -i ~/.ssh/id_ed25519 $DEPLOY_USER@$DEPLOY_HOST << 'EOF'
             set -e
@@ -75,13 +76,20 @@ jobs:
 
             cd "$DEPLOY_DIR"
 
-            echo "🌐 Ensure Traefik network"
+            echo "🔍 Checking .env file"
+            if [ ! -f .env ]; then
+              echo "❌ .env file not found at $DEPLOY_DIR/.env"
+              echo "Please create it first. See DEPLOYMENT-SETUP.md"
+              exit 1
+            fi
+
+            echo "🌐 Ensure networks"
             docker network inspect traefik-public >/dev/null 2>&1 || \
               docker network create traefik-public
+            docker network inspect crew-app-net >/dev/null 2>&1 || \
+              docker network create crew-app-net
 
-            echo "🚀 Starting containers"
-            export DOMAIN=dev-admin.merchbay.app
-            export APP_URL=https://dev-admin.merchbay.app
+            echo "🚀 Starting containers (env vars from .env file)"
             docker compose up -d
 
             echo "⏳ Waiting for app container"
@@ -106,6 +114,7 @@ jobs:
             echo "✅ Deployment completed"
           EOF
 
+
       # 6️⃣ Health check
       - name: Health check
         shell: sh