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Understand .env, env_file, and environment in Docker Compose, inspect variables inside a container, and fix PostgreSQL passwords when a volume already exists.
Read guide →Build a safer Docker Compose production stack for Node.js and PostgreSQL with health checks, private networks, volumes, secrets, log rotation, backups, and rollback.
Read guide →Fix Docker port is already allocated, address already in use, and EADDRINUSE errors on Windows and Linux without stopping the wrong process.
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