Make Dockerfiles more cacheable

[msm-code]

Right now, any change in (for example) react frontend will rebuild:

• dev-frontend from dev dockerfile (correctly, expected behaviour)
• web (expected, but should only rebuild the frontend, not everything)
• daemon (unnecessary)
• dev-web (unnecessary)

Right now we recommend docker-compose for development. We should strive to make rebuilds a faster operation.

I think we could:

• move mqueryfront to a separate directory, instead of it being a subdirectory of ./src/
• investigate npm caching in mqueryfront (I think it should be doable? Just copy package.json and install first?)

Alternatively/additionally, we may consider uploading prebuild images artifacts to dockerhub? So instead of building them locally, we can download them instead. Just a thought.