Allow APP_NAME environment variable to override .env file. #564
Description
I'm hosting my heimdall install in docker, and wanted to change the tab title. I followed the APP_NAME environment variable from #132, by adding -e APP_NAME="Media Server" onto my docker run command. However, this didn't change the tab title, and looking at the filesystem in the container, it is specified in the .env file, so it may be that it is being overridden by that.
I would like to be able to specify the APP_NAME setting through my docker run command rather than modifying the file in the container in such a fragile way.