more validation fixes

.env.docker

@@ -47,7 +47,7 @@ ADMIN_DOMAIN="${APP_DOMAIN}"
 #
 # @default "production"
 # @see https://docs.pixelfed.org/technical-documentation/config/#app_env
-# @dottie/validate required,oneof='production,dev,staging'
+# @dottie/validate required,oneof=production dev staging
 #APP_ENV="production"
 
 # When your application is in debug mode, detailed error messages with stack traces will