docs: hello world example

README.md

@@ -18,6 +18,14 @@ To fetch a resource, simply provide the resource URL as follows:
 
 `helia-verified-fetch-cli <resource-url>`
 
+### "Hello world" example
+
+This example shows how you can fetch a "hello world" CID from peers using bitswap. (note that `-t false` is disabling trustless gateway usage)
+
+```
+npm i -g @sgtpooki/helia-verified-fetch-cli
+helia-verified-fetch-cli ipfs://bafkqaddimvwgy3zao5xxe3debi --debug 'helia*,helia*:trace' --data ~/tmp/hvf-data -t false
+```
 
 ## Options