Implement user persistence via Firebase (khanon/oai-reverse-proxy!8)

.env.example

@@ -14,7 +14,10 @@
 # Note: CHECK_KEYS is disabled by default in local development mode, but enabled
 # by default in production mode.
 
-# Optional settings for prompt logging to Google Sheets
+# Optional settings for user management. See docs/user-management.md.
+# GATEKEEPER=none
+
+# Optional settings for prompt logging. See docs/logging-sheets.md.
 # PROMPT_LOGGING=false
 
 # ------------------------------------------------------------------------------
@@ -26,9 +29,17 @@
 # You can add multiple keys by separating them with a comma.
 OPENAI_KEY=sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 
-# You can require a bearer token to access the proxy by setting the key below.
+# You can require a Bearer token for requests when using proxy_token gatekeeper.
 # PROXY_KEY=your-secret-key
 
+# You can set an admin key for user management when using user_token gatekeeper.
+# ADMIN_KEY=your-very-secret-key
+
+# These are used for various persistence features. Refer to the docs for more
+# info.
+# FIREBASE_KEY=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+# FIREBASE_RTDB_URL=https://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.firebaseio.com
+
 # This is only relevant if you want to use the prompt logging feature.
 # GOOGLE_SHEETS_SPREADSHEET_ID=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 # GOOGLE_SHEETS_KEY=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx