We'll start sending out the email in the next step, when the setup
of nodemailer is complete. Right now, everything else works:
creating a verification link, processing it when clicked on, and
even updating (instead of appending) a pledge when the same email
submits multiple times. No pretty error messages though; that's
another thing to be worked on :P
WARNING: Don't deploy this commit live; people will be told about a
verification email but they won't actually get it yet!
This is so that we don't have to keep restarting the server every
time we make a change. Parcel was taking care of this for the
static files like HTML and CSS, but not for the Express server
itself: that required calling in Nodemon to do the job.
