Docker file Update with Defination

Dockerfile

@@ -1,7 +1,16 @@
+# Node Base Image
 FROM node:12.2.0-alpine
-WORKDIR app
+
+#Working Directry
+WORKDIR /node
+
+#Copy the Code
 COPY . .
+
+#Install the dependecies
 RUN npm install
 RUN npm run test
 EXPOSE 8000
+
+#Run the code
 CMD ["node","app.js"]