Set #!/bin/bash shebang on build.sh
I am following https://community.kde.org/KDE_PIM/Docker
Currently it uses /bin/sh
which shows errors due to the used bash-builtins
./build.sh: 30: read: Illegal option -n
./build.sh: 32: [[: not found
Also I am not sure about https://invent.kde.org/dvratil/kdepim-docker/-/blob/master/build.sh#L28 - where does container_name
come from?