chore: rename env vars to begin with REACT_APP_

.env-example

@@ -1,4 +1,4 @@
 export REACT_APP_CLIENT_ID=''
 export REACT_APP_BACKEND_URL=''
-export SENTRY_ENV=''
-export SENTRY_DSN=''
+export REACT_APP_SENTRY_ENV=''
+export REACT_APP_SENTRY_DSN=''

src/index.jsx

@@ -6,17 +6,17 @@ import './styles/index.scss';
 import 'sgds-govtech/css/sgds.css';
 import App from './App';
 
-if (process.env.ENV !== 'staging' || process.env.ENV !== 'production') {
-    Sentry.init({
-        dsn: process.env.SENTRY_DSN,
-        integrations: [
-          new Integrations.BrowserTracing(),
-        ],
-    
-        // We recommend adjusting this value in production, or using tracesSampler
-        // for finer control
-        tracesSampleRate: 1.0,
-    });
+if (process.env.REACT_APP_SENTRY_ENV === 'staging' || process.env.REACT_APP_SENTRY_ENV == 'production') {
+  Sentry.init({
+      dsn: process.env.REACT_APP_SENTRY_DSN,
+      integrations: [
+        new Integrations.BrowserTracing(),
+      ],
+
+      // We recommend adjusting this value in production, or using tracesSampler
+      // for finer control
+      tracesSampleRate: 1.0,
+  });
 }
 
 ReactDOM.render(<App />, document.getElementById('root'));