maptool/docker-compose.yaml

services:
  maptool:
    # "./build", not ".": the compose file's own context ("." would mean
    # the symlink's directory, /srv/podman/maptool/ — see docs/deployment.adoc)
    # is one level above where the actual checkout (and its Dockerfile)
    # lives since the previous commit moved it into build/. Volume paths
    # below resolve against that same symlink directory too, but a relative
    # *build context* specifically needs pointing at build/ itself — the
    # gap this fixes: production's compose up --build failed outright
    # ("lstat .../maptool/Dockerfile: no such file or directory") until this
    # was caught, since only the volume-path resolution got dry-run tested
    # before the previous commit shipped, not this one.
    build: ./build
    image: maptool:latest
    restart: unless-stopped
    ports:
      - "4567:4567"
    environment:
      # "[::]", not "0.0.0.0": binding the IPv6 wildcard also accepts IPv4
      # connections (dual-stack is the Linux default), so this covers both
      # without a second listener. Puma's bind URL needs the brackets around
      # a literal IPv6 address (config/puma.rb interpolates this as-is).
      BIND_HOST: "[::]"
      RACK_ENV: production
      # Read from .env (docker compose loads it automatically) — not
      # committed, see docs/deployment.adoc.
      SESSION_SECRET: ${SESSION_SECRET:?SESSION_SECRET is required, see docs/deployment.adoc}
      GITEA_OAUTH_CLIENT_ID: ${GITEA_OAUTH_CLIENT_ID:?GITEA_OAUTH_CLIENT_ID is required, see docs/deployment.adoc}
      GITEA_OAUTH_CLIENT_SECRET: ${GITEA_OAUTH_CLIENT_SECRET:?GITEA_OAUTH_CLIENT_SECRET is required, see docs/deployment.adoc}
      MAPTOOL_ALLOWED_GITEA_USER: ${MAPTOOL_ALLOWED_GITEA_USER:?MAPTOOL_ALLOWED_GITEA_USER is required, see docs/deployment.adoc}
      # Optional: blank disables the LiveTrack webhook endpoint rather than
      # failing to start, since it's not needed for the app's core function.
      LIVETRACK_WEBHOOK_SECRET: ${LIVETRACK_WEBHOOK_SECRET:-}
      # The kiwix service below, reached by its compose service name (both
      # are on the same default compose network) — port matches its own
      # --port=8080 in the command below. Not made conditional on the ZIM
      # actually being present: GET /api/kiwix pings it and just reports
      # unavailable if the container isn't up/reachable, same story as
      # every other optional-local-file feature (offline.pmtiles, etc).
      # Reached server-side only — production sits behind a reverse proxy
      # that only forwards to maptool itself, so app.rb's GET /kiwix/*
      # proxies to this instead of handing the browser this address.
      KIWIX_URL: "http://kiwix:8080"
    volumes:
      # Uploaded GPX files and the offline PMTiles extract — kept outside
      # the image so a rebuild/redeploy doesn't wipe them (see
      # docs/development.adoc for how the deploy job treats this
      # directory).
      - ./data:/app/data

  # Fakes a GNSS fix (a loop around Bratislava, see
  # bin/gnss_simulator.rb/docs/development.adoc) since there's no real
  # receiver attached here — the "GNSS" control would otherwise just show
  # "no fix" always. Remove this service (and nothing else) whenever a real
  # receiver/gpsd setup replaces it. network_mode ties it to maptool's own
  # network namespace rather than a bridge network, since GpsdClient
  # connects to a hardcoded 127.0.0.1:2947 — same as gpsd itself normally
  # being local to the machine it serves.
  gnss-simulator:
    image: maptool:latest
    depends_on:
      - maptool
    restart: unless-stopped
    network_mode: "service:maptool"
    command: ["ruby", "bin/gnss_simulator.rb"]

  # Serves an offline Wikipedia ZIM for the popup's "Nearby on Wikipedia"
  # link (see docs/development.adoc for where to get one and drop it in —
  # same "not part of the repo, place it under ./data locally" story as
  # offline.pmtiles/terrain.pmtiles). On the default compose network (not
  # network_mode: "service:maptool" — unlike gnss-simulator this doesn't
  # need a hardcoded localhost port, KIWIX_URL above reaches it by this
  # service's own name), so maptool and kiwix stay independent containers.
  # Keeps restarting (harmlessly) if data/kiwix/wikipedia.zim isn't there
  # yet — GET /api/kiwix just reports unavailable until it comes up.
  #
  # The volume binds the exact *file* path, not the data/kiwix/ directory —
  # deliberately, so data/kiwix/wikipedia.zim can be a symlink to wherever
  # the (large) real ZIM actually lives. A bind mount resolves a symlink at
  # its *source* path once, at mount time (plain mount(2) semantics, same
  # as Podman); a symlink sitting inside an already-mounted directory
  # doesn't get that treatment — the container would have to resolve it
  # itself, inside its own filesystem, where the host path it points to
  # doesn't exist.
  kiwix:
    image: ghcr.io/kiwix/kiwix-serve:latest
    restart: unless-stopped
    # No --port here: the image's own start.sh already prepends
    # --port=8080 (its default) before appending this command array, so
    # passing it again produced "Unexpected argument: --port=8080,
    # --port=8080, /data/wikipedia.zim" and kiwix-serve refused to start.
    #
    # --urlRootLocation=/kiwix makes every link/asset kiwix-serve itself
    # emits (search results, article pages, its CSS/JS) carry a /kiwix
    # prefix, matching where app.rb's GET /kiwix/* proxies requests in
    # from (confirmed against libkiwix's internalServer.cpp: it strips
    # this same prefix off incoming request paths, so both ends agree on
    # it) — no ports: mapping needed, nothing outside the compose network
    # ever talks to this container directly.
    command: ["--urlRootLocation=/kiwix", "/data/wikipedia.zim"]
    volumes:
      - ./data/kiwix/wikipedia.zim:/data/wikipedia.zim