Docker
Build a Notification Service from Scratch — Part 4: Scaling and Deployment
Final part: Scale notification workers horizontally, implement batching for high throughput, Dockerize, and deploy to production.
Build a URL Shortener from Scratch — Part 5: Analytics, Docker, and Deployment
Final part: Add click analytics with IP geolocation, Dockerize the application, and deploy to production with docker-compose.
Build a RAG Chatbot from Scratch — Part 5: Deployment and Production Considerations
Final part: Deploy the RAG chatbot to production with Docker, including cost optimization, rate limiting, and monitoring setup.
How to Dockerize a FastAPI Application with Uvicorn
Containerize a FastAPI application with Docker. Covers multi-stage builds, Uvicorn configuration, environment variables, and health checks.
How to Dockerize a Rails Application with PostgreSQL and Redis
Step-by-step guide to containerize a Ruby on Rails application with PostgreSQL and Redis using Docker and docker-compose. Production-ready setup included.
Fix: PostgreSQL 'password authentication failed for user' Error
Resolve PostgreSQL password authentication failures. Covers pg_hba.conf, role passwords, Docker-specific issues, and local trust configuration.
Fix: PostgreSQL Data Not Persisting After Docker Container Restart
Prevent data loss when restarting PostgreSQL Docker containers. Covers volumes, bind mounts, named volumes, and how to verify persistence.
Fix: Docker Port Already Allocated — Resolving Port Conflicts
Fix 'port is already allocated' errors in Docker. Find conflicting processes, understand Docker networking, and resolve port conflicts quickly.
Fix: Docker Container Exits Immediately — Debugging and Solutions
Debug Docker containers that start and immediately exit. Covers ENTRYPOINT vs CMD, foreground processes, and log inspection techniques.