fix: Workers docker issues

[mkleszcz]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes/features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce?

Fixes #458

This PR includes fixes for 3 different issues that was discovered during debugging #458:

• node_modules from the host where shared to the docker containers causing issues on Windows machines
• issue with the invalid environment variables (PATH) into workers process causing to use python3.9 instead of python3.11. This issue caused the missing module errors in the workers container.
• missing pnpm saas emails build command when starting the local environment by pnpm saas up

What is the current behavior?

All of the issues above exists.

What is the new behavior?

• Fixes incorrect paths in the .dockerignore files
• Removed NX from workers CMD image
• Added pnpm saas emails build call into pnpm saas up

Does this PR introduce a breaking change?

Nope.