Add to docs - postgres setup

[joeflack4]

Description

1. Update docs to erase sqlite stuff

2. Remove sqlite stuff from the codebase as well

3. Update docs to include postgres setup

env var: postgresql+psycopg2://pmaapi:pmaapi@localhost/pmaapi

creating a database

1. step 1 - load psql
   type: psql
2. Step 1 - create db

• Create - CREATE DATABASE <db>; (edited)

literal command:
CREATE DATABASE pmaapi; (edited)
3. make username and pw
syntax:

• Create - CREATE USER <user>;
• Make PW - ALTER USER <user> WITH PASSWORD '<pw>'; (edited)
  example:
  CREATE USER pmaapi;
ALTER USER <user> WITH PASSWORD 'pmaapi';

Joe Flack [2:14 PM]
4. give the user access to the database:

• Grant Permissions - GRANT ALL PRIVILEGES ON DATABASE <db> TO <user>;
  example:
  GRANT ALL PRIVILEGES ON DATABASE pmaapi TO pmaapi;