add verbose flag, deprecate debug false

Dockerfile: add missing ca-certificates
run: hetzner: add token env var
fix examples

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

Dockerfile

@@ -29,6 +29,7 @@ FROM ubuntu:20.04
 
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends \
+        ca-certificates \
         util-linux \
         udev \
         parted \