Add readme:

companion_software/dashboard/README.md

@@ -0,0 +1,22 @@
+Setting up getty override
+=========================
+
+```console
+systemctl edit getty@tty1.service
+```
+
+add
+
+```
+[Service]
+ExecStart=
+ExecStart=-/opt/lewis-crawker/companion_software/dashboard/entrypoint.sh
+StandardInput=tty
+StandardOutput=tty
+```
+
+then
+
+```
+systemctl daemon-reload; systemctl restart getty@tty1.service
+```