feat(docker): add PM2_INSTANCES variable and update entrypoint script… (#14083)

docker/docker-compose-template.yaml

       MARKETPLACE_URL: ${MARKETPLACE_URL:-https://marketplace.dify.ai}
       TOP_K_MAX_VALUE: ${TOP_K_MAX_VALUE:-}
       INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH: ${INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH:-}
+      PM2_INSTANCES: ${PM2_INSTANCES:-2}
 
   # The postgres database.
   db:

docker/docker-compose.yaml

       MARKETPLACE_URL: ${MARKETPLACE_URL:-https://marketplace.dify.ai}
       TOP_K_MAX_VALUE: ${TOP_K_MAX_VALUE:-}
       INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH: ${INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH:-}
+      PM2_INSTANCES: ${PM2_INSTANCES:-2}
 
   # The postgres database.
   db:

web/Dockerfile

 ENV MARKETPLACE_URL=http://127.0.0.1:5001
 ENV PORT=3000
 ENV NEXT_TELEMETRY_DISABLED=1
+ENV PM2_INSTANCES=2
 
 # set timezone
 ENV TZ=UTC
 COPY --from=builder /app/web/.next/standalone ./
 COPY --from=builder /app/web/.next/static ./.next/static
 
-COPY docker/pm2.json ./pm2.json
 COPY docker/entrypoint.sh ./entrypoint.sh
 
 

web/README.md

 pnpm run start --port=3001 --host=0.0.0.0
 ```
 
+If you want to customize the number of instances launched by PM2, you can configure `PM2_INSTANCES` in `docker-compose.yaml` or `Dockerfile`.
+
 ## Storybook
 
 This project uses [Storybook](https://storybook.js.org/) for UI component development.

web/docker/entrypoint.sh

 export NEXT_PUBLIC_TOP_K_MAX_VALUE=${TOP_K_MAX_VALUE}
 export NEXT_PUBLIC_INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH=${INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH}
 
-pm2 start ./pm2.json --no-daemon
+pm2 start /app/web/server.js --name dify-web --cwd /app/web -i ${PM2_INSTANCES} --no-daemon