feat: Added platform emails for billing limits and disabled projects

.env.self-host.example

@@ -112,6 +112,15 @@ SMTP_DOMAIN=smtp.example.com
 # Maximum recipients per email (default: 5)
 # MAX_RECIPIENTS=5
 
+# ========================================
+# OPTIONAL: Platform emails
+# ========================================
+# Your Plunk instance will send emails if you provide a Plunk API key and a from address
+# These emails include system notifications, for example when your project hits billing limits
+
+# PLUNK_API_KEY=
+# PLUNK_FROM_ADDRESS=
+
 # ========================================
 # ADVANCED (rarely needed)
 # ========================================