Implement Mongo Seeder v2

What does this MR do?

Adds seeding to User and Questions databases with following env variables to control it:

• ENABLE_QUESTION_DB_SEEDING.
• ENABLE_USER_DB_SEEDING.

Testing

• Ensure ENABLE_QUESTION_DB_SEEDING is set to true in docker-compose.
• Ensure ENABLE_USER_DB_SEEDING is set to true in docker-compose.
• Ensure Docker's MongoDB instances have no documents in Users and Questions DBs.
• Run docker compose up --build.
• Login as with username 'admin' and password 'password'.
• Question appears on page.

Relevant issues

Fixes missing seeding.

backend-services/user-service/server.js

@@ -3,6 +3,8 @@ import cors from 'cors';
 import morgan from 'morgan';
 import connect from './database/conn.js'
 import router from './router/route.js'
+import bcrypt from "bcrypt";
+import UserModel from "./model/User.model.js";
 
 const app = express();
 
@@ -22,12 +24,36 @@ app.get('/', (req, res) => {
 app.use('/api', router)
 
 // Start server only when we have valid connection
-connect().then(() => {
+connect().then(async () => {
     try {
+        // Database Seeding
+        if (process.env.ENABLE_USER_DB_SEEDING) {
+            try {
+                const password = process.env.SEEDED_ADMIN_PASSWORD
+                const hashedPassword = await bcrypt.hash(password, 10);
+            
+                const admin = new UserModel({
+                    username: "admin",
+                    password: hashedPassword,
+                    email: "admin@email.com",
+                    profile: "",
+                    admin: true
+                })
+    
+                await admin.save()
+                console.log("Successfully seeded User Database!")
+            }
+            catch(error) {
+                console.log("Error seeding User Database...")
+                console.log(error)
+            }
+        }
+        
         app.listen(port, () => {
             console.log(`Server connected to http://localhost:${port}`);
         })
     } catch (error) {
+        console.log(error)
         console.log('Cannot connect to the server')
     }
 }).catch(error => {