updates #1 - creates a dockerfile

Dockerfile

@@ -0,0 +1,10 @@
+# Build image
+FROM node:12.18-alpine AS build
+
+# Install only the production dependencies
+RUN npm i
+
+USER node
+
+EXPOSE 3000
+CMD ["npm", "start"]

package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "setup": "./scripts/setup.sh",
+    "start": "node app.js",
     "server": "webpack --config webpack.config.js && nodemon app.js",
     "dev": "webpack --config webpack.config.js --watch"
   },