Add documentation for local setup and fix admin panel bugs

- Wasn't able to login to the admin panel when KHOJ_DEBUG was not True. Fix this error so self-hosted users can get unblocked from accessing the admin settings
- Don't force users to set their KHOJ_DJANGO_SECRET_KEY

src/khoj/app/settings.py

@@ -36,7 +36,7 @@ CSRF_TRUSTED_ORIGINS = [
 ]
 
 COOKIE_SAMESITE = "None"
-if DEBUG:
+if DEBUG or os.getenv("KHOJ_DOMAIN") == None:
     SESSION_COOKIE_DOMAIN = "localhost"
     CSRF_COOKIE_DOMAIN = "localhost"
 else:

src/khoj/routers/indexer.py

@@ -341,7 +341,7 @@ def load_content(
     search_models: SearchModels,
 ):
     if content_config is None:
-        logger.warning("🚨 No Content configuration available.")
+        logger.debug("🚨 No Content configuration available.")
         return None
     if content_index is None:
         content_index = ContentIndex()