Added Dockerfile

.dockerignore

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+# Items that don't need to be in a Docker image
+# Anything not used by the build system should go here
+Dockerfile
+.dockerignore
+.gitignore
+README.md
+*/.git/
+
+# Artifacts that will be build during image creation.
+# This should contain all files created during `npm run build`.
+*/node_modules/
+*/build/

Dockerfile

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+FROM node:16-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+COPY src ./
+COPY public ./
+
+RUN yarn install
+
+# Bundle app source
+COPY . .
+
+EXPOSE 3000
+CMD ["yarn", "start"]
+
+########################################################
+################## BUILD VERSION #######################
+# Use a Node 16 base image
+#FROM node:16-alpine 
+# Set the working directory to /app inside the container
+#WORKDIR /app
+# Copy app files
+#COPY . .
+# ==== BUILD =====
+# Install dependencies
+#RUN yarn
+# Build the app
+#RUN yarn run build
+# ==== RUN =======
+# Set the env to "production"
+#ENV NODE_ENV production
+# Expose the port on which the app will be running (3000 is the default that `serve` uses)
+#EXPOSE 3000
+# Start the app
+#CMD [ "npx", "serve", "build" ]