Specify log level from the env

compose.yml

@@ -4,6 +4,8 @@ version: "3.8"
 services:
   renovate:
     image: "renovate/renovate:slim"
+    environment:
+      LOG_LEVEL: error
     configs:
       - source: config_js
         target: /usr/src/app/config.js

config.js.tmpl

@@ -2,7 +2,6 @@ module.exports = {
   endpoint: "https://git.autonomic.zone/api/v1/",
   token: '{{ secret "api_token" }}',
   platform: "gitea",
-  logLevel: "error",
   onboarding: true,
   unicodeEmoji: false,
   assignees: ["decentral1se", "calix"],