Change to http

docs/howtos/preview_on_mobile.md

@@ -21,7 +21,7 @@ Since browser development tools only offer an approximation, some tasks may requ
 1. Run the development server with `yarn build` and `yarn python-devserver`
 2. Ensure the mobile device you want to use for previewing Kolibri is connected to the same local network as your computer.
 3. Find your computer's IP address
-4. Open a browser on the mobile device and navigate to `https://<your_computer_ip_address>:8000` where you should see Kolibri.
+4. Open a browser on the mobile device and navigate to `http://<your_computer_ip_address>:8000` where you should see Kolibri.
 
 .. warning::
    When running the development server as described above, hot reload doesn't work. If you are working on the frontend, you will need to rebuild manually using `yarn build`.