Speedup docker build with cached deps, remove need for dot folders

[sitole]

• Docker build context is now set to the parent directory, so we can access the whole packages directory.
• Moved golang package cache download before source code copy, so it will be cached always, and codebase change will not re-trigger layer cache refresh, making build much faster when you are just writing code without adding deps.

---

Note

Refactors Dockerfiles and Makefiles to cache Go modules and build from parent directory, removing dot-folder copies and updating paths/binaries accordingly.

• Dockerfiles:
  • Cached deps first: Move go mod download before source copy in packages/*/Dockerfile (api, client-proxy, db, docker-reverse-proxy, orchestrator) to leverage layer caching.
  • Parent context + paths: Replace .shared/.db/.clickhouse copies with direct ./shared, ./db, ./clickhouse, ./<service> paths; adjust WORKDIRs and COPY sources accordingly.
  • Binaries/entrypoints: Normalize output locations (e.g., db migrator to ./bin/migrator) and ENTRYPOINT arrays; update final image COPY paths.
• Makefiles:
  • Build context change: Update build-and-upload (and build) targets to use docker build ... -f ./Dockerfile .., removing temporary dot-folder creation/cleanup across api, client-proxy, db, docker-reverse-proxy, orchestrator.
  • Minor path updates to match new Dockerfile structure.

^{Written by Cursor Bugbot for commit 8d3aac5. This will update automatically on new commits. Configure here.}

[jakubno]

can you move this to /pkg in a next PR? 🙏🏻

[sitole]

Yep