Added docker file

.dockerignore

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+node_modules

Dockerfile

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+## docker build --tag node-docker .
+## docker run -it -p 3000:3000 node-docker
+# syntax=docker/dockerfile:1
+
+# Specify the docker image to base off of
+FROM node:12.18.1
+# Can be production
+ENV NODE_ENV=developement
+# Create a working directory in the container
+WORKDIR /app
+# Copy package stuff in for npm install
+COPY ["package.json", "package-lock.json*", "./"]
+# Can be --production
+RUN npm install --developement
+# This copies everything into the container.
+COPY . .
+# This is what actually gets executed
+CMD [ "npm", "start" ]