Create database table for Schools

[github-actions[bot]]

Create database table for Schools

Acceptance Criteria:

• [x] There is an @Entity class called School.java
• [x] There is a @Repository class called School.java
• [x] When you start up the repo on localhost, you can see the table using the H2 console (see the file docs/h2-database.md for instructions.)
• [x] You can see the schools table when you do these steps:
  1. Connect to postgres command line with

      dokku postgres:connect team02-qa-db

  2. Enter \dt at the prompt. You should see schools listed in the table.
  3. Use \q to quit