Install requirements via install script

Closes https://git.autonomic.zone/coop-cloud/abra/issues/196.

.drone.yml

@@ -24,6 +24,7 @@ steps:
     commands:
       - apt update && apt install -yqq sudo lsb-release
       - deploy/install.abra.coopcloud.tech/installer --no-prompt
+      - ~/.local/bin/abra version
 
   - name: publish image
     image: plugins/docker