add update script

Author: nicktrn

update.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+script_dir=$(dirname "$0")
+
+. "$script_dir"/lib.sh
+
+kind=$1
+
+# shift if we have to
+if [ "$kind" = "full" ] || [ "$kind" = "webapp" ] || [ "$kind" = "worker" ]; then
+    shift
+fi
+
+echo $kind
+
+# default to full
+if [ -z "$kind" ] || ( [ "$kind" != "webapp" ] && [ "$kind" != "worker" ] ); then
+    kind="full"
+fi
+
+if [ "$kind" = "full" ]; then
+    compose_file=$script_dir/docker-compose.yml
+    extra_args="-p=trigger"
+else
+    compose_file=$script_dir/docker-compose.$kind.yml
+    extra_args="-p=trigger-$kind"
+fi
+
+docker_compose -f "$compose_file" "$extra_args" pull "$@"