docker/root/usr/bin/entrypoint already allows for the specification
of USER, USER_UID, USER_GID. But since AllowedUsers is hardcoded in
sshd_config, one cannot log in as a user different ftom git.
This change substitutes ${USER} for git in the sshd_config template.

Signed-off-by: Jeronimo Pellegrini <j_p@aleph0.info>

* - rearrange the templates to make it more logical because now ssh_config is a template
- implemented the updating of the port to the same as the port sent to the gitea config

* change the filename back

* add git protocol v2 support via SSH on Docker image

* remove new layer on dockerfile

Signed-off-by: Andrew Phillips <theasp@gmail.com>

* Added stupid docker task to makefile

* Dropped unknown option PrintLastLog from docker ssh config

* OpenSSH should log to docker stdout

* Set random pw for docker git user, otherwise it is locked

* Stop using templates and public within docker

I have restructured the docker build process entirely, the binary gets
built outside of the docker build command, now we are managing all
dependencies with real Alpine packages and I have dropped features like
socat or the cron daemon.

Signed-off-by: Thomas Boerger <tboerger@suse.de>

- VOLUME for ‘/data’
- Usage of S6 as PID 1 Process
- Usage of ‘socat’ so linked container (like databases) are binded to
localhost
- OpenSSH, Socat Link and Gogs are supervised using S6
- Size of container reduced to ~75Mo