Refactoring database and model definition into its own file

nodeapp/db/db.js

@@ -0,0 +1,20 @@
+const Sequelize = require('sequelize');
+const Op = Sequelize.Op
+
+// Setup database, using credentials set in .env
+const sequelize = new Sequelize('database', process.env.DB_USER, process.env.DB_PASS, {
+  dialect: 'sqlite',
+  storage: '.data/database.sqlite'
+});
+
+// Define 'readings' table structure
+const Readings = sequelize.define('readings', {
+  timestamp: {
+    type: Sequelize.DATE
+  },
+  reading: {
+    type: Sequelize.INTEGER
+  }
+});
+
+module.exports = {Op, Readings}