Restructure codebase to use src directory

src/config/sparkpost/sendEmail.ts

@@ -0,0 +1,20 @@
+import { SPARKPOST_SENDER_ADDRESS } from '../env';
+import client from './client';
+
+interface EmailParams {
+  address: string;
+  text: string;
+  html: string;
+  subject: string;
+}
+
+const sendEmail = async ({ address, text, html, subject }: EmailParams) => {
+  const from = SPARKPOST_SENDER_ADDRESS;
+
+  await client.transmissions.send({
+    content: { from, html, subject, text },
+    recipients: [{ address }],
+  });
+};
+
+export default sendEmail;