Add Swap Docs (#638)

docs/tutorial/swap.md

@@ -0,0 +1,50 @@
+# Running Swap Protocol
+
+## How to
+
+Build:
+
+```
+# make wakunode2 is run as part of scripts2 target
+make scripts2
+```
+
+Run two nodes and connect them:
+
+```
+# Starts listening on 60000 with RPC server on 8545.
+# Note the "listening on address" in logs.
+./build/wakunode2 --ports-shift:0
+
+# Run another node with staticnode argument
+./build/wakunode2 --ports-shift:1 --staticnode:/ip4/0.0.0.0/tcp/60000/p2p/16Uiu2HAmF4tuht6fmna6uDqoSMgFqhUrdaVR6VQRyGr6sCpfS2jp --storenode:/ip4/0.0.0.0/tcp/60000/p2p/16Uiu2HAmF4tuht6fmna6uDqoSMgFqhUrdaVR6VQRyGr6sCpfS2jp --persist-messages:true
+
+
+# Run the chat application
+./build/chat2 --staticnode:/ip4/0.0.0.0/tcp/60000/p2p/16Uiu2HAmF4tuht6fmna6uDqoSMgFqhUrdaVR6VQRyGr6sCpfS2jp --storenode:/ip4/0.0.0.0/tcp/60000/p2p/16Uiu2HAmF4tuht6fmna6uDqoSMgFqhUrdaVR6VQRyGr6sCpfS2jp 
+
+```
+ You should be prompted to provide a nickname for the chat session.
+
+```
+Choose a nickname >>
+```
+
+After entering a nickname, the app will be connected to peer `16Uiu2HAmF4tuht6fmna6uDqoSMgFqhUrdaVR6VQRyGr6sCpfS2jp`
+
+```
+
+# Run another chat application
+./build/chat2 --staticnode:/ip4/0.0.0.0/tcp/60000/p2p/16Uiu2HAmF4tuht6fmna6uDqoSMgFqhUrdaVR6VQRyGr6sCpfS2jp --storenode:/ip4/0.0.0.0/tcp/60000/p2p/16Uiu2HAmF4tuht6fmna6uDqoSMgFqhUrdaVR6VQRyGr6sCpfS2jp 
+```
+Connect with a different nickname. 
+You should see a log saying:
+```
+Crediting Peer: peer=16U*CpfS2jp amount=1
+```
+ where amount is the number of Messages received. 
+
+
+## To View the Account Metrics:
+To view the account metrics on Grafana Dashboard locally, follow the steps [here](https://github.com/status-im/nim-waku/tree/master/waku/v2#using-metrics) to set up grafana and prometheus. 
+The metrics on the live cluster can be accessed [here](https://grafana.infra.status.im/d/qrp_ZCTGz/nim-waku-v2?orgId=1&refresh=5m)