react-scripts Invalid Host header - reactjs

Question

I created an app with react-create-app, I just dev it using npm start, that seems to do react-scripts start according to my package.json
Whenever I add a proxy to my package.json, I get this error message :
Invalid Host header
I get the idea, it's a security issue. What I don't get is how to fix it. I read several issues on github and QA here on the subject, the fix is easy enough, but I still don't get where to put it
in the end, I will add a whitelist of hosts. I think I saw it's possible.
but where do I put this config to start :
devServer: {
disableHostCheck: true
}

Answer 1

Another way to disable the host check would be to set the following environment variable: DANGEROUSLY_DISABLE_HOST_CHECK=true
That can be done by e.g. adding that line to .env file in the root of the project. Note that this is not a secure solution and should not be used in production.

Answer 2

You can manage it without changing stuff inside node_modules or by ejecting your project by using an npm package called react-app-rewired.
It basically has an option to override your default hardcoded settings for webpack that are inside a create-react-app boilerplate setup.
You put a config-overrides.js inside your root folder and change the scripts inside your package.json to match react-app-rewired instead of the react-scripts. This way you can override all the webpack config that's hard coded inside a react project by writing it down inside a config-overrides.js file.
The syntax is inside this link. There's also an article about it which can be found here.

Answer 3

I never found out where to put the webpack.config.js. It didn't work in the app root directory where I suppose it should go, it didn't do anything for me, I just ended up modifying where react-scripts invokes webpack-dev-server and then put the disableHostCheck to true directly before invoking.
Basically I changed the following line :
const serverConfig = createDevServerConfig(
proxyConfig,
urls.lanUrlForConfig
);
to :
var serverConfig = createDevServerConfig(
proxyConfig,
urls.lanUrlForConfig
);
serverConfig.disableHostCheck = true;
that's really not good practice (modify the code and disableHostCheck), but now I know I can actually modify settings, I'll just go for a whitelist, may be one day I'll understand why it doesn't care about my webpack.config.js ^^

Answer 4

Install react-app-rewired:
npm install react-app-rewired --save-dev
change package.json script to
"start": "set PORT=80&&react-app-rewired start",
then add a file named .env.development, add this line:
HOST=buzzbuzzenglish.com
then add config-overrides.js file (you can override some webpack settings there but don't have to - still, file have to be created)
finally you type npm start, then browser will open and navigate to buzzbuzzenglish.com and renders normally without the Invalid Host Header error.