Rename example to build-eth-block. Add README.md.

Makefile

@@ -28,7 +28,7 @@ lt: lint test
 
 .PHONY: run-integration
 run-integration:
-	go run examples/builder/main.go
+	go run examples/build-eth-block/main.go
 	go run examples/mevm-confidential-store/main.go 
 	go run examples/mevm-is-confidential/main.go 
 	go run examples/onchain-callback/main.go 

examples/build-eth-block/README.md

@@ -0,0 +1,30 @@
+# Example Ethereum L1 Block Builder SUAPP
+
+This example demonstrates a simple block building contract that receives bundles and returns an Ethereum L1 block.
+
+## How to use
+
+Start the `suave-geth` development environment
+
+```
+$ make devnet-up  # from suave-geth root directory
+```
+
+Execute the deployment script:
+
+```
+$ go run main.go
+```
+
+Expected output:
+
+```
+2024/02/29 14:59:09 Test address 1: 0x675d92a306187fBC280f8Dd98465770FBAEFf8Ab
+2024/02/29 14:59:09 funding account 0x675d92a306187fBC280f8Dd98465770FBAEFf8Ab with 100000000000000000
+2024/02/29 14:59:09 funder 0xB5fEAfbDD752ad52Afb7e1bD2E40432A485bBB7F 115792089237316195423570985008687907853269984665640564039457584007913129639927
+2024/02/29 14:59:09 transaction hash: 0x29e67f56dfd1a01ab210dcad889eba7a99028ec1bf2206b66d8054efc14e6fda
+2024/02/29 14:59:09 deployed contract at 0xd594760B2A36467ec7F0267382564772D7b0b73c
+2024/02/29 14:59:09 deployed contract at 0x8f21Fdd6B4f4CacD33151777A46c122797c8BF17
+2024/02/29 14:59:09 transaction hash: 0x99a95bc20ea3e8c9d8a2ac21943c1c7a51599b57e4254a48f3773f923d881f2b
+2024/02/29 14:59:09 transaction hash: 0xbf9ff92a229c76f59ed7d2be06297763b796c390d725fb1863e199cdb9cff1eb
+```