dev: Add docs how to test on local environment

docs/how-to-test.md

@@ -0,0 +1,32 @@
+## How to test on Local Environment
+
+### Start the local chain
+
+```jsx
+make devnet-up  
+```
+
+### Build
+
+```jsx
+make build
+```
+
+### Set the necessary configurations in .env
+
+```jsx
+#Local Testnet
+PRIVATE_KEY=91ab9a7e53c220e6210460b65a7a3bb2ca181412a8a7b43ff336b3df1737ce12
+TA_STORE_CONTRACT_ADDRESS=0xd594760B2A36467ec7F0267382564772D7b0b73c
+RPC_URL=http://localhost:8545
+```
+
+### Execute test
+
+```jsx
+make test-go
+```
+
+```jsx
+make test-solidity
+```