[Wallabag] Docker installation

https://www.wallabag.orghttps://github.com/wallabag/docker Just replace https://your_domain with your domain. Check with docker ps if the docker container is successfully up and running. Now just add a new subdomain with ssl in your nginx-proxy-manager. Default login is wallabag:wallabag. Their corresponding android app is also available on F-droid: https://f-droid.org/en/packages/fr.gaulupeau.apps.InThePoche/