refactor(cistech-tunnel): move runtime scripts to shared folder

- Add entrypoint.sh and startup-vnc.sh to shared folder
- Override command in docker-compose.json to use /shared/entrypoint.sh
- Scripts can now be modified without rebuilding image

apps/cistech-tunnel/docker-compose.json

@@ -66,6 +66,7 @@
         "NET_ADMIN"
       ],
       "isMain": true,
+      "command": ["/shared/entrypoint.sh"],
       "extraLabels": {
         "runtipi.managed": true
       }