Deploy example contract in graph-node (#113)

* Deploy example contract in graph-node

* Add auth token in docker build for github packages

* Add steps for running tests in CI

packages/graph-node/test/tasks/example-deploy.ts

@@ -0,0 +1,15 @@
+//
+// Copyright 2022 Vulcanize, Inc.
+//
+
+import { task } from 'hardhat/config';
+import '@nomiclabs/hardhat-ethers';
+
+task('example-deploy', 'Deploys Example contract')
+  .setAction(async (args, hre) => {
+    await hre.run('compile');
+    const Example = await hre.ethers.getContractFactory('Example');
+    const example = await Example.deploy();
+
+    console.log('Example contract deployed to:', example.address);
+  });