Cleaned up hopp-backend package and modified docker and docker-compose files

Editor assessment

`chore: cleaned up hopp-backend package and modified docker and docker-compose files` bundles at least three targets — the package, Dockerfile, and compose files — under a past-tense `cleaned up` that names no defect or goal. Chore fits maintenance, but the breadth without structure makes the change opaque. No scope separates the areas, and no body explains what was cleaned or why the docker files moved with it. Style basics hold. Valid and identifiable in outline, but the grab-bag phrasing and missing rationale cap it at acceptable.