add docker

.dockerignore

@@ -0,0 +1,6 @@
+.git
+node_modules
+build
+.env.local
+.github
+.vscode

dockerfile

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+FROM node:13.12.0-alpine as build
+WORKDIR /app
+ENV PATH /app/node_modules/.bin:$PATH
+COPY package*.json ./
+RUN yarn install
+COPY . ./
+RUN yarn build
+
+# production environment
+FROM nginx:stable-alpine
+COPY --from=build /app/build /usr/share/nginx/html
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]