Update Dockerfile

Dockerfile

@@ -15,8 +15,9 @@ RUN npm install
 # Bundle app source
 COPY . .
 
-RUN npm install -g pm2
-RUN pm2 link uhyz7tcoimeb81b yrzs0totz1wqh2d
+RUN npm install pm2 -g
+ENV PM2_PUBLIC_KEY yrzs0totz1wqh2d
+ENV PM2_SECRET_KEY uhyz7tcoimeb81b
 
 EXPOSE 3000
-CMD ["nohup", "pm2", "start", "index.js" ,">","/dev/null"]
+CMD ["pm2-runtime", "index.js",">","/dev/null"]