A dedicated user is necessary to create relative references via
~/<folder> or $HOME/<folder>. Having the syncthing process just running
under a unprivileged UID/GID, will remove the home folder relation and
therefore will result in nonexistent shares after update.
Signed-off-by: Benedikt Heine <bebe@bebehei.de>
Allows for configuring the UID and GID Syncthing runs as in the container. Uses su-exec from the Alpine repos to accomplish this. Addition of su-exec results in <2MB increase in image size.
Added EXPOSE to Dockerfile. this way these ports will show up in docker GUIs like cockpit.
Added VOLUME parameter, this renders creating the folder (/var/syncthing) obsolete.
