Added SQLite database with migrations

src/db/index.ts

@@ -0,0 +1,47 @@
+require('ts-node/register');
+import { Sequelize } from 'sequelize';
+import { Umzug, SequelizeStorage } from 'umzug';
+import { Logger } from '../utils';
+
+const logger = new Logger();
+
+// DB config
+export const sequelize = new Sequelize({
+  dialect: 'sqlite',
+  storage: 'data/db.sqlite3',
+  logging: false
+});
+
+// Migrations config
+const umzug = new Umzug({
+  migrations: { glob: '**/migrations/*.ts' },
+  context: sequelize.getQueryInterface(),
+  storage: new SequelizeStorage({ sequelize }),
+  logger: undefined
+});
+
+export type Migration = typeof umzug._types.migration;
+
+export const connectDB = async () => {
+  try {
+    // Create & connect db
+    await sequelize.authenticate();
+    logger.log('Database connected');
+
+    // Check migrations
+    const pendingMigrations = await umzug.pending();
+    if (pendingMigrations.length > 0) {
+      logger.log(`Found pending migrations. Executing...`);
+    }
+
+    await umzug.up();
+  } catch (err) {
+    logger.log(`Database connection error`, 'ERROR');
+
+    if (process.env.NODE_ENV == 'development') {
+      console.log(err);
+    }
+
+    process.exit(1);
+  }
+};