Contract already deployed

[PeterYinusa]

Explanation:

Fixes: #160

Updates the test dapp to consume a query string parameter that describes a deployed contracts address, such as http://localhost:9011/?contract=0x7F775B6392f46Cf717aBB204557f64F68eB388c1

This change will allow us to;

• avoid repeatedly deploying a contract when testing (manual testing)
• deploy a contract in the test setup instead of via the browser in the test steps (e2e tests)

More information:

• The contract address in the query string param will be applied to all contracts
• You can override the contract address for a specific contract by deploying it

Before:

After refreshing the page, there's no way to interact with the deployed contract

before.-.contract.mov

After:

Once you add the query string param, you can interact with a deployed contract

after.-.contract.mov

Manual testing steps:

• Without query string param: Test deploying and interacting with all contracts
• With query string param: Test interacting with all contracts

[jpuri]

Are these logs intentional ?

[jpuri]

LGTM