Merge pull request #2587 from dunn/docker-logging

.env.docker: log to stderr

.env.docker

@@ -115,7 +115,7 @@ PF_COSTAR_ENABLED=false
 MEDIA_EXIF_DATABASE=false
 
 ## Logging
-LOG_CHANNEL=stack
+LOG_CHANNEL=stderr
 
 ## Image
 IMAGE_DRIVER=imagick