Optimised multi-stage docker build for `cogstacksystems/medcat-trainer`

[vvcb]

This is an optimised multi-stage docker build for cogstacksystems/medcat-trainer as described in detail in comments in response to #92.

• Reduce uncompressed docker image size of cogstacksystems/medcat-trainer:v2.6.0 from 7.71GB to 6.13GB
  • Separate stage for building frontend saves ~450MB by only using the dist folder that is the output of npm build
  • Disable pip cache with pip install --no-cache-dir to save >900MB
  • Copy only required folders/files to save ~20MB
• Create a non-root user to install dependencies and run container without elevated permissions
• Fix path to manage.py in run.sh

Tested and working with docker-compose.yml with cogstacksystems/medcat-trainer-nginx:v2.6.0 and solr:8 (with default cdb.dat and vocab.dat).

[tomolopolis]

hi @vvcb - thanks for the contribution here. I tried building and running locally: $ docker compose -f docker-compose-dev.yml up

when I navigate to http://localhost:8001/ - the UI doesn't come up, /admin/ does appear though.

Also on the api container - can we still have vim installed?

I've found it handy in a pinch