Update docker files

Update port number to 8080 instead

Author: qiaoen17

Backend/user-service/Dockerfile

@@ -7,5 +7,5 @@ RUN npm install
 
 COPY . .
 
-EXPOSE 3002
+EXPOSE 8080
 CMD ["npm", "start"]

docker-compose.yml

@@ -18,7 +18,7 @@ services:
       context: ./Backend/MatchingService
       dockerfile: Dockerfile
     ports:
-      - "3003:3003"
+      - "8080:8080"
 
   frontend:
     build: