[vbrandl]

Maybe I did not use it as intended, but I have an app running on fly.io that exposed the metrics endpoint on another port as the webapp itself, so it is not publicly reachable. This app suddenly broke and I had to disable the metrics endpoint to get it running again. Since it is a toy project, I didn't investigate further but internally everything worked fine (the healthcheck got the expected 200 response) but the routing of external requests just broke.

Also when building and deploying an image, some non-obvious and undocumented changes are made. My app generates version information based on the git repository state. The build process deletes (or ignores, I don't know, never got an answer to my issue) the fly.toml file in the docker build context, which resulted in uncommitted changes and a "dirty" repository when building the app. My dirty workaround is to `git checkout fly.toml` in my dockerfile. It works but it isn't pretty...