Add dockerfile and dockerignore

.dockerignore

@@ -0,0 +1,3 @@
+node_modules
+npm-debug.log
+README.md

Dockerfile

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+FROM node:16
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available ([email protected]+)
+COPY package*.json ./
+
+RUN npm install
+# If you are building your code for production
+# RUN npm ci --only=production
+
+# Bundle app source
+COPY . .
+
+EXPOSE 3000
+
+CMD [ "npm", "start" ]