add ability to kill off wizard and use sigterm to try to stop containers properly

root/etc/services.d/docker/run

@@ -1,3 +1,14 @@
 #!/usr/bin/with-contenv bash
 
+_term() {
+  if [ -f "/opt/kasm/bin/stop" ]; then
+    echo "Caught SIGTERM signal!"
+    echo "Stopping Kasm Containers"
+    /opt/kasm/bin/stop
+    pid=$(pidof stop)
+    # terminate when the stop process dies
+    tail --pid=${pid} -f /dev/null
+  fi
+}
+
 exec /usr/local/bin/dockerd-entrypoint.sh -l error --data-root /opt/docker

root/etc/services.d/wizard/run

@@ -8,5 +8,10 @@ while true; do
   sleep 1
 done
 
+# Don't do anything if wizard is disabled
+if [ -f "/opt/NO_WIZARD" ]; then
+  sleep infinity
+fi
+
 cd /wizard
 /usr/bin/node index.js