Create a page to sign up for an email newsletter

[jimbobbennett]

Our sci-fi store is not yet ready to open, so we need a way to notify potential new customers when sales are ready.

To do this, we need a signup form. This should ask the user for their details:

• name
• phone number
• email

We can then store these in a database, so that we can contact them when the store is open.

This page needs to be added to the nav bar, just after the about page. It should be a simple web form that posts the users details to a new endpoint.

[jimbobbennett]

The endpoint to post to should be /subscribe_user, and we need to create this endpoint in the app.

[jimbobbennett]

The page should have the same look and feel as the other pages, with a simple form in the center, using up 50% of the page width. This form should have introductory text at the top, the required fields, and a submit button.

The introductory text should read:

Thank you for your interest in Sci-Fi store. We can't wait to sell you the best Sci-Fi inspired
plushie toys in this or any other galaxy.

Please fill in this form so we can notify you as soon as we are open for business.

When the user clicks the submit button, a thank you message should appear.