feat: add more e2e tests to frontend

[lucaseduoli]

This pull request introduces several updates to the project's Docker configuration and frontend dependencies. The main focus is on switching Docker services from using pre-built images to building them locally, and on adding new logging-related dependencies to the frontend.

Docker configuration changes:

• Switched all services in docker-compose.yml (opensearch, openrag-backend, openrag-frontend, langflow) from using pre-built images to building from local Dockerfiles, which will help with local development and debugging. [1] [2] [3] [4]
• Exposed port 8000 for the openrag-backend service to allow direct access during development.

Frontend dependency updates:

• Added the winston logging library and its dependencies (such as logform, winston-transport, triple-beam, etc.) to frontend/package-lock.json and as a dependency, enabling advanced logging capabilities in the frontend. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17]
• Added various supporting libraries required by winston and its ecosystem, such as @colors/colors, @dabh/diagnostics, async, fecha, fn.name, inherits, kuler, one-time, readable-stream, safe-buffer, safe-stable-stringify, stack-trace, string_decoder, text-hex, and more. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

Other changes:

• Updated .dockerignore to also exclude frontend/tests/logs/ from Docker build context, preventing test logs from being sent to Docker.