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

@@ -28,18 +28,24 @@ connect().then(async () => {
     try {
         // Database Seeding
         if (process.env.ENABLE_USER_DB_SEEDING) {
-            const hashedPassword = await bcrypt.hash("password", 10);
+            try {
+                const hashedPassword = await bcrypt.hash("password", 10);
             
-            const admin = new UserModel({
-                username: "admin",
-                password: hashedPassword,
-                email: "admin@email.com",
-                profile: "",
-                admin: true
-            })
-
-            admin.save()
-            console.log("Successfully seeded User Database!")
+                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, () => {