Refactor: Update pnpm-lock.yaml and improve Docker configurations

Commit notes

This commit downgrades the lockfile version in `pnpm-lock.yaml` to ensure compatibility with existing dependencies. It also modifies the `docker-compose.yml` to use more descriptive environment variable names for PostgreSQL configuration. Additionally, several unused imports and components have been removed from the frontend code, streamlining the codebase and improving maintainability.