fix: add proxmox-daily-update support (#60)

Author: ayufan

runit/proxmox-daily-update/control/i

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+echo 'Received SIGINT...'
+kill 1

runit/proxmox-daily-update/run

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+ln -sf /usr/lib/*/proxmox-backup/proxmox-daily-update /etc/cron.daily/
+
+echo "CRON: Starting..."
+exec cron -f

versions/v3.3.2/Dockerfile

@@ -88,7 +88,7 @@ COPY --from=builder /deb/ /deb/
 # Install all packages
 RUN export DEBIAN_FRONTEND=noninteractive && \
   apt-get -y update && \
-  apt install -y runit ssmtp /deb/*.deb
+  apt install -y runit ssmtp cron /deb/*.deb
 
 # Add default configs
 ADD /pbs/ /etc/proxmox-backup-default/