Have backend require SSL

[seamustuohy]

Currently the postgresql instance we are using does not require SSL to connect to the DB. This is likely because there are issues with a knexfile parsing SSL requirements from a connection passed as a string. There are a couple of ways we can possibly address this.

1. We can break the knexfile connection definition out into its individual components.

knexfile.js

connection: {
  host: "host",
  port: "port",
  user: "user",
  password: "password",
  database: "database",
  ssl: true
 }

2. We can set the pg default to be ssl enabled before we define our db.

db/index.js

var pg = require('pg');
pg.defaults.ssl = true;

const db = require('knex')(config);

[seamustuohy]

Addressed in https://github.com/ASL-19/civicdr-backend/pull/36