Add docker

.dockerignore

@@ -0,0 +1,27 @@
+/.bundle
+.byebug_history
+config/postal.yml
+config/smtp.cert
+config/smtp.key
+config/lets_encrypt.pem
+config/signing.key
+config/fast_server.cert
+config/fast_server.key
+public/assets
+vendor/bundle
+Procfile.local
+log/*
+storage/*
+tmp/*
+spec/*
+.git/*
+.github/*
+.vscode/*
+.yardoc/*
+doc/*
+Procfile*
+node_modules
+Dockerfile
+vendor/bundle
+.cache
+docker/*

Dockerfile

@@ -0,0 +1,48 @@
+FROM ruby:2.6
+
+RUN apt-get update
+RUN apt-get install software-properties-common -y
+
+# Setup additional repositories
+RUN apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8
+RUN add-apt-repository 'deb [arch=amd64,i386,ppc64el] http://mirrors.coreix.net/mariadb/repo/10.1/ubuntu xenial main'
+RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
+RUN apt-get update
+
+# Install main dependencies
+RUN apt-get install -y \
+  build-essential  \
+  curl \
+  libmariadbclient-dev \
+  nano \
+  nodejs
+
+# Setup an application
+RUN useradd -r -d /opt/postal -m -s /bin/bash -u 999 postal
+USER postal
+RUN mkdir -p /opt/postal/app /opt/postal/config
+WORKDIR /opt/postal/app
+
+# Install bundler
+RUN gem install bundler --no-doc
+RUN bundle config frozen 1
+RUN bundle config build.sassc --disable-march-tune-native
+
+# Install the latest and active gem dependencies and re-run
+# the appropriate commands to handle installs.
+COPY Gemfile Gemfile.lock ./
+RUN bundle install -j 4
+
+# Copy the application (and set permissions)
+COPY --chown=postal . .
+
+# Copy temporary configuration file which can be used for
+# running the asset precompilation.
+COPY --chown=postal config/postal.defaults.yml /opt/postal/config/postal.yml
+
+# Precompile assets
+RUN POSTAL_SKIP_CONFIG_CHECK=1 RAILS_GROUPS=assets bundle exec rake assets:precompile
+RUN touch /opt/postal/app/public/assets/.prebuilt
+
+# Set the CMD
+CMD ["bundle", "exec"]

PotamusFile

@@ -0,0 +1,2 @@
+image_name: registry.katapult.dev/generic/postal
+

lib/postal/config.rb

@@ -188,6 +188,8 @@ module Postal
   end
 
   def self.check_config!
+    return if ENV['POSTAL_SKIP_CONFIG_CHECK'].to_i == 1
+
     unless File.exist?(self.config_file_path)
       raise ConfigError, "No config found at #{self.config_file_path}"
     end