Remove AI and MongoDb

Author: SPWwj

README.md

@@ -5,14 +5,15 @@
 This project follows a microservices architecture with the following services:
 1. **Frontend** - Port `3000`
 2. **User Service** - Port `3001`
-3. **Question Service** - Port `3002`
+3. **Question Service** - Port `3002` 
 4. **Matching Service** - Port `3003`
 5. **Collaboration Service** - Port `3004`
 6. **MongoDB** - Port `27017` (Database)
 7. **Nginx API Gateway** - Port `80`
 8. **Redis** - Port `6379`
 9. **Zookeeper** - Port `2181`
 10. **Kafka** - Port `9092`, Port `29092`
+11. **Chat Service** (Located in addon/chat)
 
 ### Setting up the Project
 Copy and paste the .env.example files in each service. Rename them as .env files.
@@ -23,6 +24,7 @@ Files to do this in:
 4. /backend/question-service
 5. /backend/matching-service
 6. /backend/collaboration-service
+
 Then, run `node -e "console.log(require('crypto').randomBytes(32).toString('hex'))"` twice to generate
 your 2 JWT token secrets. For the first one, paste it into the JWT_ACCESS_TOKEN_SECRET variable of
 the .env files in question-service and user-service. Then, copy the second into the
@@ -31,10 +33,15 @@ JWT_REFRESH_TOKEN_SECRET of the .env file in user-service.
 Further note: The DB_CLOUD_URI .env variable in user-service doesn't need to be filled in. A local
 database will be created in the mongoDB service. 
 
-Consult the readme files in the service if there are further configurations needed.
+Consult the readme files in each service if there are further configurations needed.
+
 ### Running the Project
 
-To run all services, execute the following command in the root directory:
+To run the main services, execute the following command in the root directory:
+
+`docker-compose up --build`
+
+To run the chat service, navigate to the addon/chat directory and run:
 
 `docker-compose up --build`
 
@@ -49,8 +56,9 @@ Once the containers are up:
 - Redis: [http://localhost:6379](http://localhost:6379)
 - Zookeeper: [http://localhost:2181](http://localhost:2181)
 - Kafka: [http://localhost:9092](http://localhost:9092)
+- Chat Service: Available through the main application
 
-Note that even after docker says that everything is up and running, there is a risk that they aren't when you load the frontend.  Wait for the frontend logs to show up in the docker logs.
+Note that even after docker says that everything is up and running, there is a risk that they aren't when you load the frontend. Wait for the frontend logs to show up in the docker logs.
 In this event, wait for about a minute before trying again. If that still doesn't work and there are network errors, try
 rebuilding the services by running `docker-compose up --build` again.
 
@@ -64,4 +72,4 @@ rebuilding the services by running `docker-compose up --build` again.
 
 ### Nginx API Gateway
 
-- Nginx runs on port `80` and acts as the API gateway for routing requests to the respective services.
+- Nginx runs on port `80` and acts as the API gateway for routing requests to the respective services.