docs: update local development guide
* Create a copy of the `src/assets/config.json5` called `src/assets/local-config.json5`
* Adapt the `endpoint` and `auth.url` to match you apiman and keycloak setup
-* Execute `npm run start` or use our provided run configuration
+* Execute `npm ci && npm run start` or use our provided run configuration (Jetbrains IntelliJ/WebStorm)
#### Linux / Windows
```bash
cp src/assets/config.json5 src/assets/local-config.json5
+npm ci
npm run start
```
