fix(render): use dockerCommand in render.yaml instead of modifying Dockerfile

- Revert Dockerfile to generic CMD for compatibility with other platforms
- Add dockerCommand to render.yaml to run gateway with proper flags
- Use CLAWDBOT_GATEWAY_PASSWORD env var for password auth
- Remove healthCheckPath (gateway uses WebSocket, not HTTP health)

render.yaml

@@ -3,18 +3,16 @@ services:
     name: moltbot
     runtime: docker
     plan: starter
-    healthCheckPath: /health
+    dockerCommand: node dist/index.js gateway --port 8080 --bind lan --auth password --allow-unconfigured
     envVars:
       - key: PORT
         value: "8080"
-      - key: SETUP_PASSWORD
+      - key: CLAWDBOT_GATEWAY_PASSWORD
         sync: false
       - key: CLAWDBOT_STATE_DIR
         value: /data/.clawdbot
       - key: CLAWDBOT_WORKSPACE_DIR
         value: /data/workspace
-      - key: CLAWDBOT_GATEWAY_TOKEN
-        generateValue: true
     disk:
       name: moltbot-data
       mountPath: /data