add env_vars nobuild

changedetection.io/config.yaml

@@ -12,6 +12,7 @@ map:
   - config:rw
 name: Changedetection.io
 options:
+  env_vars: []
   PGID: 0
   PUID: 0
   TIMEOUT: "60000"
@@ -20,6 +21,9 @@ ports:
 ports_description:
   5000/tcp: Webui
 schema:
+  env_vars:
+    - name: match(^[A-Z0-9_]+$)
+      value: str?
   BASE_URL: str?
   PGID: int
   PUID: int