Add .env.sample for DB and Port

Author: wr1159

.env.sample

@@ -22,6 +22,10 @@ EMAIL_PASSWORD=
 ## Matching service variables
 MATCHING_SVC_PORT=6969
 
+## Collab service variables
+COLLAB_SVC_PORT=3002
+COLLAB_SVC_DB_URI=
+
 ## Redis variables
 REDIS_PORT=6379
 

collab-service/app/server.js

@@ -4,7 +4,7 @@ import index from "./index.js";
 import { Server } from "socket.io";
 import { addMessageToChat } from "./model/repository.js";
 
-const PORT = process.env.PORT || 5000;
+const PORT = process.env.PORT || 3002;
 const server = http.createServer(index);
 
 const io = new Server(server, {

docker-compose.yml

@@ -70,7 +70,7 @@ services:
     build:
       context: ./collab-service
     ports:
-      - 5000:5000
+      - $COLLAB_SVC_PORT:$COLLAB_SVC_PORT
     environment:
-      - PORT=5000
-      # - DB_URI=$CLOUD_MONGO_URI
+      - PORT=$COLLAB_SVC_PORT
+      - DB_URI=$COLLAB_SVC_DB_URI