Update database connection method

Author: Keskimaki

README.md

@@ -38,9 +38,7 @@ DISCORD_SERVER_INVITE=your-discord-server-invite
 PORT=your-custom-backend-port
 SESSION_SECRET=server-session-secret
 BACKEND_SERVER_URL=backend-server-url-without-port
-POSTGRES_USERNAME=your-postgres-username (postgres if not changed)
-POSTGRES_PASSWORD=your-postgres-password
-DB_HOST= (only if you are not using PostgreSQL locally)
+DATABASE_URL=postgres-connection-string (eg. postgres://postgres:postgres@localhost:5432/postgres)
 GRAFANA_TOKEN=your-grafana-authorization-token
 GRAFANA_URL=your-server-url/grafana/your-dashboard-specific-stuff
 GRAFANA_PANEL_ID=your-grafana-panel-id

src/db/dbInit.js

@@ -1,17 +1,9 @@
 require("dotenv").config();
 const Sequelize = require("sequelize");
-const password = process.env.POSTGRES_PASSWORD;
 
-let username = process.env.POSTGRES_USERNAME;
-if (!username) {
-  username = "postgres";
-}
+const dbUrl = process.env.DATABASE_URL;
 
-const sequelize = new Sequelize("postgres", username, password, {
-  dialect: "postgres",
-  host: process.env.DB_HOST || "localhost",
-  logging: false,
-});
+const sequelize = new Sequelize(dbUrl, { logging: false });
 
 const Course = require("./models/Course")(sequelize, Sequelize.DataTypes);
 const Channel = require("./models/Channel")(sequelize, Sequelize.DataTypes);