build(docker): optimize docker setup and compose configuration

- Split Dockerfile into multi-stage build to reduce final image size
- Update docker-compose.yml with restart policies and health checks
- Improve .dockerignore files for both frontend and backend
- Fix MinIO bucket creation script to use 'alias set' instead of deprecated command
- Enhance PostgreSQL healthcheck configuration

worklenz-frontend/.dockerignore

@@ -0,0 +1,6 @@
+node_modules
+npm-debug.log
+.git
+.gitignore
+.dockerignore
+README.md