Fix administration and development docs

docs/development/live-backend.md

@@ -0,0 +1,20 @@
+# Developing against a live backend
+
+You can also run Soapbox FE locally with a live production server as the backend.
+
+> **Note:** Whether or not this works depends on your production server. It does not seem to work with Cloudflare or VanwaNet.
+
+To do so, just copy the env file:
+
+```
+cp .env.example .env
+```
+
+And edit `.env`, setting the configuration like this:
+
+```
+BACKEND_URL="https://pleroma.example.com"
+PROXY_HTTPS_INSECURE=true
+```
+
+You will need to restart the local development server for the changes to take effect.