Added Dockerfile to build a docker image

.dockerignore

@@ -0,0 +1,2 @@
+node_modules
+npm-debug.log

Dockerfile

@@ -0,0 +1,21 @@
+### https://nodejs.org/en/docs/guides/nodejs-docker-webapp/
+FROM node:10
+
+# Create app directory
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY package*.json ./
+
+RUN npm install
+# If you are building your code for production
+# RUN npm install --only=production
+
+# Bundle app source
+COPY . .
+
+EXPOSE 3333
+
+CMD [ "npm", "start" ]

README.md

@@ -26,3 +26,10 @@ You have the following CLI commands available:
 - `npm run build` Runs Webpack build
 
 - `npm run serve` Serves the `build/` folder contents
+
+## Build and run docker image
+
+-  `docker build -t react-rock-paper-scissors .`
+
+-  `docker run -p 3333:3333 react-rock-paper-scissors`
+