react-scripts: command not found

I am currently trying to use create-react-app which uses three different packages: react, react-scripts and react-dom. I have installed create-react-app and then when I change into the directory and hit npm start I get a react-scripts: command not found. I've ran into a lot of problems with this. I can see react-scripts is in my node_modules folder but I keep getting command not found when trying to run npm start. I tried to delete and re-install all of my node_modules but it didn't work. Anyone else having this issue?

 ✘ ✝  Node/toDoApp/my-test   master±  npm start

> [email protected] start /Users/jzilch/Desktop/Web 
Projects/Node:Express/Node/toDoApp/my-test
> react-scripts start

sh: react-scripts: command not found
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! [email protected] start: `react-scripts start`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely 
additional logging output above.

Firstly Delete package-lock.json file in your project folder.

And then install dependencies again by npm install. That should solve this issue.

This usually happens because of a bad npm packages installation (using npm and yarn at the same time?). It can be desperating, but if you try these steps, it should work.

1st solution:

Remove node_modules folder. At the project's root folder, run

> yarn
> yarn run start

2nd solution:

At the project's root folder, run

> yarn upgrade
> yarn
> yarn run start

Next time you want to add a dependency using create-react-app, I recommend you to use 'yarn add' instead of 'npm install'. (Source: https://github.com/facebook/create-react-app/issues/1155)

Delete the /node_modules directory and the package-lock.json file using the rm command:

rm -rf node_modules
rm -rf package-lock.json

Install react-scripts using the following command:

npm install react-scripts

Install the dependencies using the following command:

npm install

Start the local server by running the following command:

npm run start

Note: If you are a Linux user then don't forget to add the sudo command before npm.

I use this in a dockerizer enviroment. I already install locally in node_modules using package.json.

so, I added this:

RUN npm install -g react-scripts
RUN npm install

That solved my confusing issue

As I was using yarn, I had to run yarn add react-scripts.