fix: set docker compose project name for predictable container names

Without -p, Docker Compose uses the directory name (deploy/) as the
project name, creating containers like deploy-app-1 instead of
hello-world-app-1. The generated Caddyfile expects <app-name>-app-1.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: baijum

.github/workflows/deploy.yml

@@ -44,11 +44,11 @@ jobs:
               || docker compose -f /opt/platform/docker-compose.yml exec -T postgres \
               psql -U postgres -c "CREATE DATABASE ${APP_DB}"
 
-            # Build and start app containers
-            docker compose -f deploy/docker-compose.yml up -d --build
+            # Build and start app containers (project name = app name for predictable container names)
+            docker compose -p ${APP_NAME} -f deploy/docker-compose.yml up -d --build
 
             # Run database migrations
-            docker compose -f deploy/docker-compose.yml exec -T app alembic -c app/alembic.ini upgrade head
+            docker compose -p ${APP_NAME} -f deploy/docker-compose.yml exec -T app alembic -c app/alembic.ini upgrade head
 
             # Health check
             bash scripts/health-check.sh https://${{ secrets.APP_DOMAIN }}/health