Fix gh CLI missing in Dockerfile and add Bulk Env Update feature

docker update

lib

lib added

feat: add Node.js 18 installation and build social media publishers frontend

feat: Introduce a unified FastAPI application to mount existing apps under subpaths and migrate the social media publisher backend from Flask to FastAPI.

user

refactor: migrate the web application from Flask to FastAPI.

refactor: migrate the web application from Flask to FastAPI, updating dependencies and Dockerfile to use uvicorn.

copy first

copy first

copy first

refactor: Consolidate Dockerfile to project root, add user for security, and adjust paths for unified build.