consul: docker build has strange permissions on config file.

[brucellino]

The configuration file provisioned with the playbook has unknown permissions, leading to the container not starting:

docker run --rm ghcr.io/brucellino/consul:latest
==> config: Readdir failed on /etc/consul.d/. lstat /etc/consul.d//consul.hcl: permission denied 

Upon closer investigation:

root@9d080a8cdfc7:/home/consul# ls -lht /etc/consul.d/consul.hcl 
-rw-r--r-- 1 consul consul 1.4K Mar 19 04:10 /etc/consul.d/consul.hcl
root@9d080a8cdfc7:/home/consul# su --login consul
$ bash
consul@9d080a8cdfc7:~$ ls -lht /etc/consul.d/
ls: cannot access '/etc/consul.d/consul.hcl': Permission denied
total 0
-????????? ? ? ? ?            ? consul.hcl

[brucellino]

Closed in #210