Delete leftover dpkg files

packer/build.pkr.hcl

@@ -87,6 +87,7 @@ build {
         rm -f /etc/ssh/ssh_host_*key*
         rm -f /etc/wireguard/*-*key /etc/wireguard/*-iface
         find /var/lib/apt/lists/ -mindepth 1 -delete
+        find / -type f -regex '.+\.\(dpkg\|ucf\)-\(old\|new\|dist\)' -delete
       EOF
     ]
   }