How do you use docker in development and delivery?

Question

Ruby on Rails

I am using docker while developing a Ruby on Rails application.
Dockerfile
FROM ruby:2.5.1

RUN apt-get update && apt-get install -qq -y --no-install-recommends \
    build-essential \
    nodejs \
    libpq-dev \
 && rm -rf /var/lib/apt/lists/*

RUN mkdir /rails_app
WORKDIR /rails_app

COPY . .

RUN bundle install

Faced with the fact that after each major change in the code, you have to rebuild the container again to look at the result in the browser.
Building a container takes a long time, most of the time is gem loading.
Is it possible to somehow use volume in the working folder of the project so that the changes take effect immediately?

Answer 1

Can.
Copying code to a container is used when deploying to production servers, and volume is usually forwarded during development.