Add production configuration

[ryanwi]

This repo is currently focused on getting a local development environment up and running and is not fully ready for production deployment.

Options to consider:

• separate production dockerfile

• maintain single dockerfile and add bundling
• create multi-stage single dockerfile
• incorporate docker-compose.yml into the mix too

[spryffee]

any updates? It would be nice to see any notes on how this can be used to deploy on standalone production server

[januszm]

A nice production/deployment dockerfile is autogenerated when you use fly.io or https://github.com/rubys/dockerfile-rails
the idea is to use multi-stage dockerfile with base and build layer, where build is only used for installing dependencies (e.g. it'll contain all postgresql or mysql -dev packages along with other libXXX-dev stuff that is only required to install gems with native extensions) and is discarded after gems are installed. I'm just thinking that dockerfile-rails already provides this

FROM ruby:$RUBY_VERSION-slim as base
# gem update, install nodejs

# Throw-away build stage to reduce size of final image
FROM base as build

# Install packages needed to build gems and node modules
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y build-essential libpq-dev git ...

# yarn install
# bootsnap precompile
# assets precompile

# Final stage for app image
FROM base

RUN apt-get -y install postgresql-client ...
# and so on

[ryanwi]

@januszm is this along the lines of what you were thinking? #239

[januszm]

Yes, exactly, thanks for the info.