* publish docker images from main
* try with separate step
* redo, lots of boilerplate
* try to fix syntax
* unique step names
* fix docker tags, remove cargo-chef
* only build dev image on main branch
* use `ref` for condition, as `branch` uses the target branch for PRs
* consistent indents
* fix tag
* use lemmy-ui:dev image for `docker/dev` and `docker/federation`
* Trying out cargo chef and a travis docker image cache.
* trying to change internal target.
* Use latest cargo-chef with --target
* Remove caching for now.
* Adding back in chowns
* Adding back in cache.
* Remove travis caching.
* Switching dev dockerfile to match prod, using cargo-chef and alpine.
* Make travis happy
* Trying a chown rust.
* Caching cargo-chef first.
* Moving the chowns
* Removing many copy commands.
* Go back to rust 1.47.0 due to config-rs breaking.
* Adding the old volume mount version.
* Adding some script comments.
Co-authored-by: Luca Palmieri <lpalmieri@truelayer.com>
