Not the most elegent solution, but it works™ and should be fine in a
container

bash is now necessary to run the knot post-receive hooks; see
https://tangled.sh/@tangled.sh/core/blob/master/hook/setup.go#L134

Otherwise gives an error of `invalid port specification: "133342"`

Signed-off-by: Anirudh Oppiliappan <anirudh@tangled.sh>