cs16-dm-server: CS 1.6 deathmatch server in Docker

One-command setup (SteamCMD + pinned, checksum-verified ReHLDS / ReGameDLL /
Metamod-R / AMXX / ReAPI / ReUnion / CSDM-ReAPI / YaPB / GunGame), .env
settings, ./cs menu (map, DM/GunGame mode, bots, kill counter, restart,
update), own plugins (extras, rtv, mode switch), all-time kill counter,
watchdog + nightly backup, docs for admins and players.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docker-compose.yml

@@ -0,0 +1,31 @@
+# CS 1.6 deathmatch server. Settings: .env (see .env.example). Setup: ./setup.sh
+# Game: UDP ${CS_PORT} on all interfaces (network_mode host, so no port mapping needed).
+services:
+  cs:
+    build: .
+    image: cs16-dm-server:local
+    container_name: ${CS_NAME:-cs16}
+    user: "${CS_UID:-1000}:${CS_GID:-1000}"
+    network_mode: host
+    restart: unless-stopped
+    init: true         # tini as PID 1: if hlds crashes the container exits and Docker restarts it
+    ulimits:
+      core: 0          # a crash would otherwise write a ~170 MB core file
+    logging:           # cap docker logs (console output grows forever)
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
+    stdin_open: true
+    tty: true
+    env_file: .env
+    environment:
+      - HOME=/cs/steamcmd-home
+    volumes:
+      - ./hlds:/cs/hlds
+      - ./steamcmd-home:/cs/steamcmd-home
+      - ./secrets:/cs/secrets:ro
+      - ./tools:/cs/tools:ro
+    # start.sh writes .env values into the game configs, then runs hlds_run
+    # (-norestart: on a crash the container exits and Docker's restart policy takes over).
+    command: ["/bin/sh", "/cs/tools/start.sh"]