Update Dockerfile

Dockerfile

@@ -9,18 +9,8 @@ WORKDIR /usr/src/app
 COPY package*.json ./
 
 RUN npm install
-
-RUN npm init -y
-
-RUN npm install colyseus
-
-RUN npm install --save @colyseus/monitor
-
-RUN npm install express
-
-#RUN npm install ws
-# If you are building your code for production
-# RUN npm ci --omit=dev
+RUN npm install --save express
+RUN npm install --save ws
 
 # Bundle app source
 COPY . .