[CRA] Installing dependencies after eject

[bennygenel]

After ejecting a CRA app user have to install the required dependencies before running the app again. This is leading an error in development server after ejecting the app.

It would be a good UX if a warning shows up after ejecting, telling to run command npm install or maybe event better to run the command right after eject task finishes without prompting anything.

[joshwcomeau]

Huh, I was under the impression that this wouldn't be necessary (after all, the dependencies are already there; it updates your package.json but the stuff in node_modules shouldn't change). I thought I tested this, as well... So I suspect there might be some other bug if things stop working after ejecting.

But yeah, we definitely want to make sure ejecting doesn't break things! Worth looking into. Thanks for the report 👍

[melanieseltzer]

Fixed in #261!