Add city gameplay, snapshot migrations, administration and Compose operations

compose.yaml

@@ -0,0 +1,61 @@
+name: citygen
+services:
+  app:
+    build: .
+    init: true
+    restart: unless-stopped
+    ports:
+      - "${CITYGEN_HOST_IP:-127.0.0.1}:${CITYGEN_PORT:-3000}:3000"
+    environment:
+      CITYGEN_BIND: 0.0.0.0:3000
+      CITYGEN_ADMIN_TOKEN: ${CITYGEN_ADMIN_TOKEN:-}
+      CITYGEN_AGENTS: ${CITYGEN_AGENTS:-1000}
+      CITYGEN_MAX_ROOMS: ${CITYGEN_MAX_ROOMS:-5}
+      CITYGEN_SAVE_INTERVAL: ${CITYGEN_SAVE_INTERVAL:-60}
+      CITYGEN_SAVE_QUOTA_BYTES: ${CITYGEN_SAVE_QUOTA_BYTES:-2147483648}
+      CITYGEN_SIM_THREADS: ${CITYGEN_SIM_THREADS:-4}
+      CITYGEN_MAX_GENERATION_KM2: ${CITYGEN_MAX_GENERATION_KM2:-25}
+      CITYGEN_MAX_BUILDINGS: ${CITYGEN_MAX_BUILDINGS:-10000}
+      CITYGEN_GENERATION_WORKERS: ${CITYGEN_GENERATION_WORKERS:-2}
+    volumes:
+      - cities:/app/public/cities
+      - saves:/app/data
+    stop_grace_period: 120s
+    mem_limit: ${CITYGEN_MEMORY:-4g}
+    cpus: ${CITYGEN_CPUS:-4}
+    pids_limit: 256
+    security_opt:
+      - no-new-privileges:true
+    cap_drop: [ALL]
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
+  prometheus:
+    image: prom/prometheus:v3.15.1
+    profiles: [monitoring]
+    restart: unless-stopped
+    depends_on:
+      app:
+        condition: service_healthy
+    command:
+      - --config.file=/etc/prometheus/prometheus.yml
+      - --storage.tsdb.retention.time=7d
+      - --storage.tsdb.retention.size=1GB
+    ports:
+      - "127.0.0.1:${CITYGEN_METRICS_PORT:-9090}:9090"
+    volumes:
+      - ./deploy/prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - ./deploy/alerts.yml:/etc/prometheus/alerts.yml:ro
+      - metrics:/prometheus
+    mem_limit: 512m
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
+volumes:
+  cities:
+  saves:
+  metrics: