fix(backend): fixes bug that doesn't launch qri if there is no QRI_PATH

This feels like a temp fix.

We should think about loading this from a config or localStorage (not sure if we can load it from localStorage in this part of the process), so folks can use different identities

app/backend.js

@@ -28,7 +28,7 @@ class BackendProcess {
 
   launchProcess () {
     try {
-      this.process = childProcess.spawn(this.qriBinPath, ['connect'], {})
+      this.process = childProcess.spawn(this.qriBinPath, ['connect', '--setup'], {})
       this.process.on('error', (err) => { this.handleEvent('error', err) })
       this.process.on('exit', (err) => { this.handleEvent('exit', err) })
       this.process.on('close', (err) => { this.handleEvent('close', err) })