UAT to Production Migration

🚧
UAT Sign-Off
After completing Integration, send a testing URL/App to PhonePe for the sanity check. Production credentials will be shared post UAT sign-off by PhonePe.

Replace below parameters before going LIVE to production.

Parameter	Steps
`MerchantID`	Use the `merchantID` shared for Production
`Host URL`	Replace the UAT host URL in the Server API calls with https://api.phonepe.com/apis/hermes
`API keys`	Replace the UAT keys with the Production Keys for checksum/X-VERIFY header computation in all the API calls.
`PhonePe Production Package Name`	com.phonepe.app