cleanup directory strucutre and fine tune

app/Dockerfile

@@ -0,0 +1,18 @@
+FROM node:current-slim
+
+# To Create nodejsapp directory
+WORKDIR /nodejsapp
+
+# To Install All dependencies
+COPY package*.json .
+RUN npm install
+
+# To copy all application packages 
+COPY . .
+
+# expose the data dir as a volume
+VOLUME [ "dataDir" ]
+
+# Expose port 1280 and Run the server.js file to start node js application
+EXPOSE 1280
+CMD [ "node", "dumbserver.js" ]