Improve Docker Compose defaults and docs

docker-compose.yml

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+services:
+  dolibarr-mcp:
+    build:
+      context: .
+      dockerfile: docker/Dockerfile
+    image: dolibarr-mcp:latest
+    container_name: dolibarr-mcp-server
+    restart: unless-stopped
+    environment:
+      # Dolibarr API Configuration
+      DOLIBARR_URL: ${DOLIBARR_URL:-https://your-dolibarr-instance.com/api/index.php}
+      DOLIBARR_API_KEY: ${DOLIBARR_API_KEY:-your_api_key_here}
+
+      # Logging Configuration
+      LOG_LEVEL: ${LOG_LEVEL:-INFO}
+      PYTHONUNBUFFERED: 1
+
+      # MCP Server Configuration (HTTP listener by default)
+      MCP_TRANSPORT: ${MCP_TRANSPORT:-http}
+      MCP_HTTP_PORT: ${MCP_HTTP_PORT:-8080}
+      MCP_HTTP_HOST: ${MCP_HTTP_HOST:-0.0.0.0}
+      MCP_SERVER_NAME: dolibarr-mcp
+      MCP_SERVER_VERSION: 1.0.0
+
+    # Expose port for HTTP MCP clients
+    ports:
+      - "${MCP_HOST_PORT:-18004}:8080"
+
+    # Health check
+    healthcheck:
+      test: ["CMD", "python", "-c", "import sys; from src.dolibarr_mcp.config import Config; sys.exit(0 if Config().api_key else 1)"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
+
+    # Resource limits
+    deploy:
+      resources:
+        limits:
+          cpus: "1.0"
+          memory: 512M
+        reservations:
+          cpus: "0.25"
+          memory: 128M
+
+    # Logging
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "10m"
+        max-file: "3"
+
+    networks:
+      - dolibarr-mcp-network
+
+  # Optional: Connection check (run on demand)
+  dolibarr-mcp-test:
+    build:
+      context: .
+      dockerfile: docker/Dockerfile
+    image: dolibarr-mcp:latest
+    container_name: dolibarr-mcp-test
+    environment:
+      DOLIBARR_URL: ${DOLIBARR_URL}
+      DOLIBARR_API_KEY: ${DOLIBARR_API_KEY}
+      LOG_LEVEL: DEBUG
+    command: python -m dolibarr_mcp.test_connection
+    profiles:
+      - test
+    networks:
+      - dolibarr-mcp-network
+
+networks:
+  dolibarr-mcp-network:
+    driver: bridge
+    name: dolibarr-mcp-net
+
+# To run the main server:
+# docker compose up -d
+#
+# To run tests:
+# docker compose --profile test up dolibarr-mcp-test