fix npm script

packages/slackbot-proxy/package.json

@@ -9,7 +9,7 @@
     "dev:ci": "yarn dev --ci",
     "dev": "cross-env NODE_ENV=development ts-node-dev -r tsconfig-paths/register -r dotenv-flow/config src/index.ts",
     "start:prod:ci": "yarn start:prod --ci",
-    "start:prod": "cross-env NODE_ENV=production node -r dotenv-flow/config ../../dist/slackbot-proxy/index.js",
+    "start:prod": "cross-env NODE_ENV=production node -r dotenv-flow/config dist/index.js",
     "test": "yarn test:lint && yarn test:coverage",
     "test:unit": "cross-env NODE_ENV=test jest --passWithNoTests",
     "test:coverage": "yarn test:unit",