Update Dockerfile to use yarn and clean up docker-compose.yml

Dockerfile

@@ -4,9 +4,10 @@ FROM node:latest
 WORKDIR /usr/src/app
 
 # Install deps
-COPY package*.json ./
+COPY package.json ./
+COPY yarn.lock ./
 
-RUN npm install
+RUN yarn
 
 COPY . .
 

docker-compose.yml

@@ -4,8 +4,6 @@ services:
   mongo:
     image: mongo:4.4
     restart: always
-    ports:
-      - 27017:27017
     volumes: 
       - ./data:/data/db