how to Configure EBS to run npm install

Question

I have node.js application I want to deploy to ebs, however I have two package.jsons for the client and the server. My Idea is that I want server to simply serve the built version of the client.
```
client
|-package.json
server
|-package.json
```
I was having a hard time finding in the docs if there was a way to configure the npm install command so it would first run the two installs in each sub directory.

I have nodecommand.config that will start the server ie: 
```
option_settings:
  aws:elasticbeanstalk:container:nodejs:
    NodeCommand: "(cd server && npm run start-prod)"
```
is there a way to do this for the install as well?

Answer

You can check this one - https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/command-options-specific.html

NodeCommand:
Command used to start the Node.js application. If an empty string is specified, app.js is used, then server.js, then npm start in that order.

how to Configure EBS to run npm install

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