Update Dockerfiles, main.py, constants.py, and package versions (#1691)

* Update Dockerfiles to include user creation and use --user flag for pip install

* Add JavaScriptMIMETypeMiddleware to main.py

* Update constants.py and run.py files

* Update package versions in poetry.lock and pyproject.toml files

* Refactor Dockerfile to optimize image building process

* Fix import error in main.py

* Update Dockerfiles to use logspace/langflow image