Add doc for Debian packaging

docs/debian.md

@@ -0,0 +1,50 @@
+# Debian Package
+
+**bkctld** package can be build from the **debian** branch of this Git repository with git-buildpackage and sbuild.
+
+## Dependencies
+
+Install Debian dependencies :
+
+~~~
+apt install git-buildpackage sbuild
+~~~
+
+Add your user to sbuild :
+
+~~~
+sbuild-adduser <username>
+~~~
+
+*You must logout and re-login or use `newgrp sbuild` in your current shell*
+
+You need a schroot definition in */etc/schroot/schroot.conf*, eg :
+
+~~~
+[sid]
+description=Debian sid (unstable)
+directory=/srv/chroot/sid
+groups=root,sbuild
+root-groups=root,sbuild
+aliases=unstable,default
+~~~
+
+Build the sbuild chroot :
+
+~~~
+sbuild-createchroot --include=eatmydata,ccache,gnupg unstable /srv/chroot/sid http://deb.debian.org/debian
+~~~
+
+## Build
+
+You must be in **debian** branch :
+
+~~~
+git checkout debian
+~~~
+
+Launch git-buildpackage :
+
+~~~
+gbp buildpackage
+~~~