add env_vars nobuild

fireflyiii/config.yaml

@@ -74,6 +74,7 @@ map:
   - share:rw
 name: Firefly iii
 options:
+  env_vars: []
   APP_KEY: CHANGEME_32_CHARS_EuC5dfn3LAPzeO
   CONFIG_LOCATION: /config/addons_config/fireflyiii/config.yaml
   DB_CONNECTION: sqlite_internal
@@ -85,6 +86,9 @@ ports_description:
   8080/tcp: web interface
   8443/tcp: ssl web interface
 schema:
+  env_vars:
+    - name: match(^[A-Z0-9_]+$)
+      value: str?
   APP_KEY: str
   CONFIG_LOCATION: str
   DB_CONNECTION: list(sqlite_internal|mariadb_addon|mysql|pgsql)