The browser lives at /docker/falkordb-browser/ on the host (separate from
the MiroFish stack so they can be restarted independently). It joins the
mirofish_net bridge network as 'external' and dials the same FalkorDB
sidecar the MiroFish app uses. Users sign in via the browser UI by entering
host=falkordb, port=6379, empty user/pass — the connection is server-side
from inside the browser container, so the user's machine doesn't need
direct access to the Docker network.