Add migrate command to the path in the Docker image

[mrosales]

Is your feature request related to a problem? Please describe.
When using the docker image, either for interactive purposes or for something like a CI runtime, it is often helpful to override the entrypoint and just run the container using with a shell entrypoint. It would be nice to have the migrate binary linked on the path so it can be executed with migrate rather than /migrate.

Describe the solution you'd like
In order to avoid breaking backwards compatibility the cleanest solution is probably just to link the /migrate binary to /usr/bin in case anyone depends on the file being saved at the current location.

Are there any objections to this or was there a reason to avoid placing the binary on the path to begin with?

[dhui]

Are there any objections to this or was there a reason to avoid placing the binary on the path to begin with?

No objections. I believe/migrate was used for simplicity. Also, I wouldn't count on a shell being available in the docker image. In the future, we might use a scratch docker image.

Feel free to open a PR w/ your suggested change!

[dhui]

Fixed in v4.10.0