Fix container name conflicts in zero-downtime deployment

- Use unique timestamp-based container names to avoid conflicts
- Clean up existing temporary containers before starting new ones
- Generate unique names like 'portfolio-app-temp-1234567890'
- Prevents 'container name already in use' errors
- Ensures reliable zero-downtime deployments

.gitea/workflows/ci-cd.yml

@@ -109,9 +109,18 @@ jobs:
           if [ "$CURRENT_CONTAINER_RUNNING" = "true" ]; then
             echo "🔄 Performing rolling update..."
             
-            # Start new container with temporary name (no port mapping needed for health check)
+            # Generate unique container name
+            TIMESTAMP=$(date +%s)
+            TEMP_CONTAINER_NAME="portfolio-app-temp-$TIMESTAMP"
+            echo "🔧 Using temporary container name: $TEMP_CONTAINER_NAME"
+            
+            # Clean up any existing temporary containers
+            echo "🧹 Cleaning up any existing temporary containers..."
+            docker rm -f portfolio-app-new portfolio-app-temp-* || true
+            
+            # Start new container with unique temporary name (no port mapping needed for health check)
             docker run -d \
-              --name portfolio-app-new \
+              --name $TEMP_CONTAINER_NAME \
               --restart unless-stopped \
               --network portfolio_net \
               -e NODE_ENV=${{ vars.NODE_ENV }} \
@@ -134,7 +143,7 @@ jobs:
             
             # Health check new container using docker exec
             for i in {1..20}; do
-              if docker exec portfolio-app-new curl -f http://localhost:3000/api/health > /dev/null 2>&1; then
+              if docker exec $TEMP_CONTAINER_NAME curl -f http://localhost:3000/api/health > /dev/null 2>&1; then
                 echo "✅ New container is healthy!"
                 break
               fi
@@ -150,7 +159,7 @@ jobs:
             docker rm portfolio-app || true
             
             # Rename new container
-            docker rename portfolio-app-new portfolio-app
+            docker rename $TEMP_CONTAINER_NAME portfolio-app
             
             # Update port mapping
             docker stop portfolio-app