Fix finishing (#11)

example/rootfs/etc/services.d/example/finish

@@ -2,4 +2,7 @@
 # ==============================================================================
 # Take down the S6 supervision tree when example fails
 # ==============================================================================
+if { s6-test ${1} -ne 0 }
+if { s6-test ${1} -ne 256 }
+
 s6-svscanctl -t /var/run/s6/services

example/rootfs/etc/services.d/example/run

@@ -6,3 +6,5 @@
 ## Add your code here
 
 bashio::log.info "Hello world"
+
+# exec my_program --with-params