docker/Dockerfile

+# From base image node
+FROM node:16
+
+# Create app directory
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+# Copying all the files from your file system to container file system
+COPY package.json .
+
+# Install all dependencies
+RUN npm install
+
+# Copy other files too
+COPY ./ .
+
+# Expose the port
+EXPOSE 3030
+
+# Command to run app when intantiate an image
+CMD ["npm","start"]

package.json

@@ -4,7 +4,8 @@
   "description": "",
   "main": "server.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
   },
   "author": "",
   "license": "ISC",