update admin und löschung

.env.example

@@ -9,5 +9,12 @@ AUTH_MODE=local
 # OIDC_REDIRECT_URL=http://localhost:8080/auth/callback
 # OIDC_SCOPES=openid profile email
 
+# Comma-separated usernames, emails or OIDC subjects that should always become admins.
+# The very first user is also promoted to admin automatically.
+CHAT_ADMINS=jan
+
+# Which global roles may create rooms. Valid: admin, moderator, user
+ROOM_CREATE_ROLES=admin,moderator
+
 # Generate with: openssl rand -base64 32
 SESSION_SECRET=replace-with-a-random-32-byte-secret