Initial scaffold for ShellMate - SSH chess TUI

docker-compose.yml

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+services:
+  shellmate:
+    build: .
+    ports:
+      - "2222:2222"
+    environment:
+      - SHELLMATE_SSH_PORT=2222
+      - SHELLMATE_REDIS_URL=redis://redis:6379
+      - SHELLMATE_DATABASE_URL=postgresql://shellmate:shellmate@postgres:5432/shellmate
+      - STOCKFISH_PATH=/usr/games/stockfish
+    depends_on:
+      - redis
+      - postgres
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "nc", "-z", "localhost", "2222"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  redis:
+    image: redis:7-alpine
+    volumes:
+      - redis_data:/data
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  postgres:
+    image: postgres:16-alpine
+    environment:
+      - POSTGRES_USER=shellmate
+      - POSTGRES_PASSWORD=shellmate
+      - POSTGRES_DB=shellmate
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U shellmate"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  redis_data:
+  postgres_data: