Add start:chain script and update migration

This is in the interest of making local development easier to automate.

The `start:chain` script runs /scripts/start_blockchain.sh, which starts
a local instance of ganache with keys pre-defined in
ganache-accounts.json

migrations/4_nifty_minter.js

@@ -3,6 +3,5 @@ const VoluntaryCarbonUnit = artifacts.require('./VoluntaryCarbonUnit.sol');
 // eslint-disable-next-line no-unused-vars
 module.exports = async (deployer) => {
   const vcu = await VoluntaryCarbonUnit.deployed();
-  await vcu.addMinter('0xa24491d6378e843D7fe84bf20C589cFc5aC77562');
-  await vcu.addMinter('0x6D758C3A656869bbb9431b6c67E500d24a838959');
+  await vcu.addMinter('0xb77d57f4959eafa0339424b83fcfaf9c15407461');
 };

package.json

@@ -27,7 +27,8 @@
     "lint:js:fix": "npx eslint . --fix",
     "lint:sol": "npx solhint --max-warnings 0 \"contracts/**/*.sol\"",
     "coverage": "npx solidity-coverage",
-    "migrate:local": "npx truffle migrate --network local --reset && cp build/contracts/* app/src/contracts/",
+    "start:chain": "scripts/start_blockchain.sh",
+    "migrate:local": "npx truffle migrate --network local --compile-all --reset && cp build/contracts/* app/src/contracts/",
     "migrate:rinkeby": "npx truffle migrate --network rinkeby --reset && cp build/contracts/* app/src/contracts/",
     "migrate:kovan": "npx truffle migrate --network kovan --reset && cp build/contracts/* app/src/contracts/",
     "deploy": "npx truffle deploy",

scripts/start_blockchain.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # Start local test network
-ganache-cli --acctKeys "./ganache-accounts.json" --noVMErrorsOnRPCResponse --gasLimit 6721975 \
+ganache-cli -v --acctKeys "./ganache-accounts.json" --gasLimit 6721975 \
   --account="0x0355596cdb5e5242ad082c4fe3f8bbe48c9dba843fe1f99dd8272f487e70efae, 100000000000000000000" \
   --account="0xe9aebe8791ad1ebd33211687e9c53f13fe8cca53b271a6529c7d7ba05eda5ce2, 100000000000000000000" \
   --account="0x6f36842c663f5afc0ef3ac986ec62af9d09caa1bbf59a50cdb7334c9cc880e65, 100000000000000000000" \