add docker file

Author: Zara Kay

Dockerfile

@@ -0,0 +1,20 @@
+FROM ruby:2.6.5
+
+RUN apt-get update && apt-get install --yes \
+  python-dev \
+  unzip \
+  curl
+
+RUN curl --silent --output awscli-bundle.zip \
+  https://aws-cli.s3.amazonaws.com/awscli-bundle.zip && \
+  unzip awscli-bundle.zip && \
+  ./awscli-bundle/install -i /usr/local/aws -b /usr/local/bin/aws
+
+CMD [ "bundle", "exec", "jekyll", "serve", "--host=0.0.0.0" ]
+
+WORKDIR /usr/src/levelup
+COPY . /usr/src/levelup
+
+RUN gem install bundler
+RUN bundle config set deployment 'true'
+RUN bundle install --jobs 8