Add Docker deployment files for Unity infrastructure migration

.dockerignore

@@ -1,2 +1,7 @@
 .git
-.dockerignore
+log/*
+tmp/*
+vendor/bundle
+node_modules
+.bundle
+.DS_Store

Dockerfile

@@ -1,20 +1,34 @@
-FROM ruby:2.5
-RUN apt-get update -qq && apt-get install -y build-essential libmariadb-dev libcups2-dev libpq-dev nodejs tzdata
-RUN mkdir /sxrestaurant
-RUN mkdir -p /sxrestaurant/tmp/puma
-ENV RAILS_ENV production
-ENV RACK_ENV production
-WORKDIR /sxrestaurant
-#RUN gem install bundler
-#COPY Gemfile /sxrestaurant/Gemfile
-#COPY Gemfile.lock /sxrestaurant/Gemfile.lock
-#RUN bundle install --without development test
-RUN echo "Asia/Rangoon" > /etc/timezone
-RUN dpkg-reconfigure -f noninteractive tzdata
-RUN date
-COPY . /sxrestaurant
-RUN gem install bundler
-#RUN bundle update --bundler
-RUN bundle install --without development test
-RUN bundle exec rake assets:precompile
-CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]
+FROM ruby:2.6.10-slim-bullseye
+
+# Install dependencies (MySQL client + ImageMagick for CarrierWave/MiniMagick)
+RUN apt-get update -qq && apt-get install -y --no-install-recommends \
+    build-essential \
+    default-libmysqlclient-dev \
+    nodejs \
+    git \
+    curl \
+    imagemagick \
+    libmagickwand-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Install gems
+COPY Gemfile Gemfile.lock ./
+RUN bundle install --deployment --without development test --jobs 4
+
+# Copy application
+COPY . .
+
+# Create required directories
+RUN mkdir -p tmp/pids tmp/puma tmp/cache tmp/sockets log storage public/uploads
+
+# Precompile assets
+RUN RAILS_ENV=production SECRET_KEY_BASE=placeholder bundle exec rake assets:precompile 2>/dev/null || true
+
+EXPOSE 3000
+
+COPY entrypoint.sh /app/entrypoint.sh
+RUN chmod +x /app/entrypoint.sh
+
+CMD ["/app/entrypoint.sh"]

config/puma_docker.rb

@@ -0,0 +1,17 @@
+# Puma configuration for Docker deployment
+application_path = File.expand_path('..', __dir__)
+directory application_path
+
+environment ENV.fetch('RAILS_ENV') { 'production' }
+pidfile "#{application_path}/tmp/puma/pid"
+state_path "#{application_path}/tmp/puma/state"
+
+# Log to stdout/stderr in Docker
+stdout_redirect '/dev/stdout', '/dev/stderr', true
+
+# Use PORT env var (default 3000 for Coolify)
+port ENV.fetch('PORT') { 3000 }
+
+workers ENV.fetch('WEB_CONCURRENCY') { 3 }
+preload_app!
+threads 5, 16

entrypoint.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+
+# Start Sidekiq in background
+bundle exec sidekiq -C config/sidekiq.yml -e production &
+
+# Start Puma on port 3000
+exec bundle exec puma -C config/puma_docker.rb