Adding instructions on tunneling to check if ClusterODM on HPC working or not

README.md

@@ -155,6 +155,31 @@ It is also possible to pre-populate nodes using JSON. If starting ClusterODM fro
 
 ```
 
+After finish hosting ClusterODM on the head node and finish wiring it to the NodeODM, you can try tunneling to see if ClusterODM works as expected. Open another shell window in your local machine and tunnel them to the HPC using the following command:
+
+```
+ssh -L localhost:10000:localhost:10000 user@hostname
+```
+
+Replace user and hostname with your appropriate username and the hpc address. Basically, this command will tunnel the port of the hpc to your local port. After this, open a browser in your local machine and connect to `http://localhost:10000`. Port 10000 is where ClusterODM's administrative web interface is hosted at. This is what it looks like:
+
+![image](https://user-images.githubusercontent.com/70782465/214938402-707bee90-ea17-4573-82f8-74096d9caf03.png)
+
+Here you can check the NodeODMs status and even add or delete working nodes.
+
+After that, do tunneling for port 3000 of the HPC to your local machine:
+
+```
+ssh -L localhost:3000:localhost:3000 user@hostname
+```
+
+Port 3000 is ClusterODM's proxy. This is the place we assign tasks to ClusterODM. Once again, connect to `http://localhost:3000` with your browser after tunneling. Here, you can Assign Tasks and observe the tasks' processes.
+
+![image](https://user-images.githubusercontent.com/70782465/214938234-113f99dc-f69e-4e78-a782-deaf94e986b0.png)
+
+After adding images in this browser, you can press Start Task and see ClusterODM assigning tasks to the nodes you have wired to. Go for a walk and check the progress.
+
+
 ## Roadmap
 
 We have [plenty of goals](https://github.com/OpenDroneMap/ClusterODM/issues?q=is%3Aopen+is%3Aissue+label%3Aenhancement). If you want to help, or need help getting started contributing, get in touch on the [OpenDroneMap community forum](https://community.opendronemap.org).