add docker

Dockerfile

@@ -0,0 +1,21 @@
+FROM ruby:2.7.1
+
+LABEL maintainer="Radin <radin@instedd.org>"
+
+RUN curl -sL https://deb.nodesource.com/setup_14.x | bash - && \
+  echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
+  curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
+  apt-get update -qq && \
+  apt-get install -y vim nodejs sqlite3 libsqlite3-dev yarn && \
+  apt-get clean && \
+  rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+RUN mkdir /app
+WORKDIR /app
+
+COPY Gemfile* package.json yarn.lock /app/
+
+RUN gem install bundler -v 2.1.4 && \
+  bundle install --jobs 20
+
+COPY . /app