Switching to SQLite and auto-migrating and auto-seeding on container startup

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.6.3 
+FROM ruby:2.7.1
 
 # Install apt based dependencies required to run Rails as 
 # well as RubyGems. As the Ruby image itself is based on a 
@@ -29,9 +29,13 @@ EXPOSE 3000
 
 # Configure an entry point, so we don't need to specify 
 # "bundle exec" for each of our commands.
-ENTRYPOINT ["bundle", "exec"]
+# ENTRYPOINT ["bundle", "exec"]
 
 # The main command to run when the container starts. Also 
 # tell the Rails dev server to bind to all interfaces by 
 # default.
-CMD ["rails", "server", "-b", "0.0.0.0"]
+# CMD ["rails", "server", "-b", "0.0.0.0"]
+
+# ENV RAILS_ENV=production
+# CMD rails db:migrate && rails db:seed && rails s
+CMD bundle exec rake db:migrate && bundle exec rake db:seed && bundle exec puma -C config/puma.rb

Gemfile

@@ -3,7 +3,7 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby '2.6.3'
+ruby '2.7.1'
 
 gem 'puma', '~> 3.11'           # Use Puma as the app server
 gem 'rails', '~> 5.2.3'         # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
@@ -30,7 +30,8 @@ gem 'leaflet-awesome-markers-rails', '~> 2.0'
                                 # Custom markers for Leaflet
 
 gem 'leaflet-rails'             # Handles Leaflet-based maps
-gem 'pg'                        # Use Postgres
+# gem 'pg'                        # Use Postgres
+gem 'sqlite3'
 gem 'geokit-rails'              # Provides geolocation-based searches
 
 group :development, :test do