I was trying the following:

$ docker run --rm -it --env DATABASE_URL="..." --mount type=bind,source=...,target=/app amacneil/dbmate --no-dump-schema --migrations-dir /app up

However I repeatedly get:

Error: dial tcp 127.0.0.1:57806: connect: connection refused

DATABASE_URL points to the postgres server running on another Docker container (not sure how that should matter?)

Do I need to to anything in addition to the above command to be able to run migrations on another Docker container that is running postgres?