Merge container logic into start.sh

This whole container thinking is over-engineered and we will get to
it if and when we need to.

setup/start/systemd/box.service

@@ -0,0 +1,22 @@
+[Unit]
+Description=Cloudron Admin
+OnFailure=crashnotifier@%n.service
+StopWhenUnneeded=true
+; journald crashes result in a EPIPE in node. Cannot ignore it as it results in loss of logs.
+BindsTo=systemd-journald.service
+
+[Service]
+Type=idle
+WorkingDirectory=/home/yellowtent/box
+Restart=always
+ExecStart=/usr/bin/node --max_old_space_size=150 /home/yellowtent/box/box.js
+Environment="HOME=/home/yellowtent" "USER=yellowtent" "DEBUG=box*,connect-lastmile" "BOX_ENV=cloudron" "NODE_ENV=production"
+; kill apptask processes as well
+KillMode=control-group
+User=yellowtent
+Group=yellowtent
+MemoryLimit=200M
+TimeoutStopSec=5s
+StartLimitInterval=1
+StartLimitBurst=60
+