provide additional info to help users set up for frontend dev environment

doc/installing-from-source.md

@@ -47,6 +47,20 @@ API_TARGET=http://192.168.1.1:8080 npm run dev
 The UI will listen on `localhost:5173` and instantly show any frontend changes
 you make. Backend changes require building everything from the top (daemon and installer).
 
+You may need to turn off your VPN in order to load the frontend succesfully - even with local network sharing enabled, VPNs can interfere with the connection to the backend.
+
+Specifically for WSL users:
+
+- The HyperV firewall also tends to interfere with the connection between frontend and backend. You can turn it off in your WSL settings.
+
+- WSL2 has a known compatibility issue which may prevent vite from detecting file system changes and therefore affects HMR (hot module replacement).
+If your hot reloading does not work, some have success using polling to detect changes. To do so, specify the following setting in vite.config.ts:
+```ts
+server: {
+    watch: { usePolling: true }
+}
+```
+
 ## Installer utils, getting a shell
 
 Check `./scripts/install-dev.sh util --help`