CLI: use .hyper.js from repo root dir when running in dev mode (#2792)

.vscode/launch.json

@@ -8,6 +8,15 @@
       "runtimeExecutable": "${workspaceRoot}/node_modules/.bin/electron",
       "program": "${workspaceRoot}/app/index.js",
       "protocol": "inspector"
+    },
+     {
+      "type": "node",
+      "request": "launch",
+      "name": "cli",
+      "runtimeExecutable": "node",
+      "program": "${workspaceRoot}/bin/cli.js",
+      "args": ["--help"],
+      "protocol": "inspector"
     }
   ]
 }

cli/api.js

@@ -4,8 +4,14 @@ const got = require('got');
 const registryUrl = require('registry-url')();
 const pify = require('pify');
 const recast = require('recast');
+const path = require('path');
 
-const fileName = `${os.homedir()}/.hyper.js`;
+const devConfigFileName = path.join(__dirname, `../.hyper.js`);
+
+let fileName =
+  process.env.NODE_ENV !== 'production' && fs.existsSync(devConfigFileName)
+    ? devConfigFileName
+    : `${os.homedir()}/.hyper.js`;
 
 /**
  * We need to make sure the file reading and parsing is lazy so that failure to