Align naming with coulomb.social reuse-surface conventions

Use reuse.coulomb.social, REUSE_SURFACE_URL/TOKEN env vars, reuse-surface
image and reuse-surface-env secret. Replace reuse-surface-hub entrypoint with
reuse-surface serve; CLI uses --base-url.

pyproject.toml

@@ -23,7 +23,6 @@ dev = [
 
 [project.scripts]
 reuse-surface = "reuse_surface.cli:main"
-reuse-surface-hub = "reuse_surface.hub.app:main"
 
 [tool.setuptools.packages.find]
 where = ["."]