Try running "npm install" in your functions directory before deploying

[AmilKey]

When attempting to deploy Firebase, the following error occurs:

Try running "npm install" in your functions directory before deploying.

This happens because the necessary npm packages are not installed in the functions directory. To avoid this error and automate the process, we should update the deployment script to automatically install packages before deployment.

Proposed Solution: Add a step to install npm packages in the deployment script

[w9jds]

Not all projects use NPM, some use pnpm and if you are using emulators or using firebase for testing this isn't something the action should handle for you, that is something you would setup in your own workflow as it's not related to the firebase action.