add env_vars nobuild

navidrome/config.yaml

@@ -14,6 +14,7 @@ map:
   - ssl:rw
 name: Navidrome
 options:
+  env_vars: []
   base_url: /
   certfile: fullchain.pem
   data_folder: /data
@@ -26,6 +27,9 @@ ports:
 ports_description:
   4533/tcp: Web interface
 schema:
+  env_vars:
+    - name: match(^[A-Z0-9_]+$)
+      value: str?
   base_url: str
   certfile: str?
   cifsdomain: str?