added webpack 5 create-react-app instructions (#4670)

* added webpack 5 create-react-app instructions

* cleaning up readme

* updating readme

CHANGELOG.md

@@ -496,4 +496,5 @@ Released with 1.0.0-beta.37 code base.
 ## [1.7.1]
 
 ### Fixed
--  Fix a typo in the documentation for `methods.myMethod.send` (#4599)
+-  Fix a typo in the documentation for `methods.myMethod.send` (#4599)
+-  Updated README to include Webpack 5 create-react-app support instructions (#4173)

README.md

@@ -103,6 +103,83 @@ If you are using the types in a `commonjs` module, like in a Node app, you just
 
 ## Trouble shooting and known issues.
 
+### Web3 and Create-react-app
+
+If you are using create-react-app version >=5 you may run into issues building. This is because NodeJS polyfills are not included in the latest version of create-react-app.
+
+### Solution
+
+
+- Install react-app-rewired and the missing modules
+
+If you are using yarn:
+```bash
+yarn add --dev react-app-rewired crypto-browserify stream-browserify assert stream-http https-browserify os-browserify url buffer
+```
+
+If you are using npm:
+```bash
+npm install --save-dev react-app-rewired crypto-browserify stream-browserify assert stream-http https-browserify os-browserify url buffer process
+```
+
+- Create `config-overrides.js` in the root of your project folder with the content:
+
+```javascript
+const webpack = require('webpack');
+
+module.exports = function override(config) {
+    const fallback = config.resolve.fallback || {};
+    Object.assign(fallback, {
+        "crypto": require.resolve("crypto-browserify"),
+        "stream": require.resolve("stream-browserify"),
+        "assert": require.resolve("assert"),
+        "http": require.resolve("stream-http"),
+        "https": require.resolve("https-browserify"),
+        "os": require.resolve("os-browserify"),
+        "url": require.resolve("url")
+    })
+    config.resolve.fallback = fallback;
+    config.plugins = (config.plugins || []).concat([
+        new webpack.ProvidePlugin({
+            process: 'process/browser',
+            Buffer: ['buffer', 'Buffer']
+        })
+    ])
+    return config;
+}
+```
+
+- Within `package.json` change the scripts field for start, build and test. Instead of `react-scripts` replace it with `react-app-rewired`
+
+before: 
+```typescript
+"scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+},
+```
+
+after:
+```typescript
+"scripts": {
+    "start": "react-app-rewired start",
+    "build": "react-app-rewired build",
+    "test": "react-app-rewired test",
+    "eject": "react-scripts eject"
+},
+```
+
+The missing Nodejs polyfills should be included now and your app should be functional with web3.
+- If you want to hide the warnings created by the console:
+
+In `config-overrides.js` within the `override` function, add:
+
+```javascript
+config.ignoreWarnings = [/Failed to parse source map/];
+```
+
 ### Web3 and Angular
 
 ### New solution