chore: move backend to hono + typescript (#558)

* feat: setup secure presigned uploads and downloads

* clean up

* update lock

* Get presigned url finally working

* 557: Migrate backend to hono + ts

* chore: update Dockerfile and package.json for backend configuration

* add dev command

* remove unused packages

* Enhance backend API and frontend components for course management

- Updated CORS configuration in the backend to allow specific methods and headers.
- Refactored lesson download endpoint to use a new route for PDF downloads.
- Removed unused certificate download functionality from the lesson router.
- Updated frontend components to reflect changes in API endpoints and improve video upload functionality.
- Introduced new video upload component and adjusted video handling in lesson materials.
- Cleaned up unnecessary imports and optimized component structure for better performance.

* PR cleanups

* Enhance email configuration by adding SMTP_SENDER environment variable

- Updated docker-compose.yaml to include SMTP_SENDER.
- Modified Dockerfile to accept SMTP_SENDER as an argument.
- Updated environment schema in env.ts to define SMTP_SENDER as optional.
- Adjusted mail service to use SMTP_SENDER for the email 'from' field.
- Updated documentation to reflect the new SMTP_SENDER variable.

* Remove debug log statement from sendEmail function

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Co-authored-by: Iniubong Obonguko <iniubongobonguko2018@gmail.com>

apps/backend/src/utils/auth/validate-user.ts

@@ -0,0 +1,21 @@
+import { User } from '@supabase/supabase-js';
+import { getSupabase } from '../supabase.js';
+
+const supabase = getSupabase();
+
+export async function validateUser(accessToken: string): Promise<User> {
+  let user: User | null = null;
+
+  try {
+    const { data } = await supabase.auth.getUser(accessToken);
+    user = data.user;
+  } catch (error) {
+    console.error(error);
+  }
+
+  if (!user) {
+    throw new Error('Unauthenticated user');
+  }
+
+  return user;
+}