Add Dockerfile for development

Dockerfile

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+# syntax=docker/dockerfile:1
+FROM ruby:2.7
+RUN apt-get update -qq && apt-get install -y curl ldap-utils
+RUN curl -fsSL https://deb.nodesource.com/setup_lts.x | bash -
+RUN apt-get update && apt-get install -y nodejs
+WORKDIR /akkounts
+COPY Gemfile /akkounts/Gemfile
+COPY Gemfile.lock /akkounts/Gemfile.lock
+COPY package.json /akkounts/package.json
+RUN bundle install
+RUN npm install -g yarn
+RUN yarn install
+
+# Add a script to be executed every time the container starts.
+COPY docker/entrypoint.sh /usr/bin/
+RUN chmod +x /usr/bin/entrypoint.sh
+ENTRYPOINT ["entrypoint.sh"]
+EXPOSE 3000
+
+# Configure the main process to run when running the image
+CMD ["bin", "dev"]