* rename socket file, make example more precise, use long parameter name

* correct path

* use the correct path to the configuration file according to the documentation

* rename the socket unit back to 'gitea.main.socket', explicitly indicate that the socket unit should use the service file 'gitea.service'

* Update the provided gitea.service since we have graceful restarting again

* Update contrib/systemd/gitea.service

Co-Authored-By: guillep2k <18600385+guillep2k@users.noreply.github.com>

When using unix socket as listener (`HTTP_ADDR = /run/gitea/gitea.socket`) then it's required to have the folder `/run/gitea` with appropriate owner/group. Manual creation leads to vanishing after reboot. This directive enables Systemd to handle this.

* More detailed documentation on how to set up from binary
Also change recommended file locations

in regards to binding to lower ports than 1024

* Renamed scripts directory into contrib

* Added script to download gitignores from github

* Synced gitignores with github repo