Reduce amount layers of the docker image (#4448)

* Reduce amount layers of the docker image

* Fix models file name

docker/rootfs/etc/services.d/go2rtc/finish

@@ -1,5 +1,7 @@
-#!/usr/bin/execlineb -S1
-if { s6-test ${1} -ne 0 }
-if { s6-test ${1} -ne 256 }
+#!/usr/bin/with-contenv bash
+# shellcheck shell=bash
+# Take down the S6 supervision tree when the process fails
 
-s6-svscanctl -t /var/run/s6/services
+if [[ "${1}" -ne 0 && "${1}" -ne 256 ]]; then
+  exec s6-svscanctl -t /var/run/s6/services
+fi