Connect UI templates to API backend

[chidimo]

What does this PR do?

Connect authentication forms to API backend

Description of Task to be completed?

• Connect sign up form with backend API
• Connect sign in form to backend API
• Connect profile edit form to backend API
• Power user dashboard with backend API data
• Let users get a link to verify their email address

How should this be manually tested?

Backend test

1. Clone the repo
2. cd into the root folder on a cmd shell and run yarn install. PowerShell is fine also.
3. Setup a PostgreSQL DB.
4. Define a .env file in the root of the project and supply values for the following parameters

   JWT_SECRET=<json-web-token-secret>
   DBNAME=<database-name>
   PGPASSWORD=<postgres-db-password>
   PGHOST=<postgres-db-host>
   PGUSER=<postgres-db-user>
   PGPORT=<postgres-db-port>

5. Create a PostgreSQL database called testdb.
6. Run command yarn test

Frontend test

1. Clone the repo
2. Open /UI/authentication.html in a browser
3. Click the sign in or sign up tab.
4. Enter the required credentials. You should be redirected to your dashboard, which will have up to date information coming from the api backend server.

Any background context you want to provide?

Nil

What are the relevant pivotal tracker stories?

166187100
166278056
166278087
166278113
166278071

Screenshots (if appropriate)

Questions:

Nil