out-of-band update: add Heroku deploy task

lib/tasks/deploy.rake

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+namespace :deploy do
+  HEROKU_STAGING_DEPLOY = <<~BASH
+    git push -f obsekio-staging staging:master && \
+    heroku run rake db:migrate -a obsekio-staging && \
+    heroku run rake data:migrate -a obsekio-staging && \
+    heroku restart -a obsekio-staging
+  BASH
+
+  HEROKU_PRODUCTION_DEPLOY = <<~BASH
+    git push -f obsekio-production master:master && \
+    heroku run rake db:migrate -a obsekio-production && \
+    heroku run rake data:migrate -a obsekio-production && \
+    heroku restart -a obsekio-production
+  BASH
+
+  def print_warning(deploy_environment)
+    printf <<~TEXT
+      \033[31m
+      WARNING! You are about to deploy to the tool-for-systemic-change '#{deploy_environment}' environment.
+      \033[0m
+    TEXT
+  end
+
+  def print_confirmation(deploy_environment)
+    print "Are you ready to release to '#{deploy_environment}'? Type 'yes' to continue: "
+  end
+
+  def confirmed?
+    STDIN.gets.strip.upcase == 'YES'
+  end
+
+  desc 'deploy to staging environment'
+  task :staging do
+    print_warning('staging')
+    print_confirmation('staging')
+    if confirmed?
+      sh(HEROKU_STAGING_DEPLOY)
+    else
+      puts 'Cancelling release.'
+    end
+  end
+
+  desc 'deploy to production environment'
+  task :production do
+    print_warning('PRODUCTION')
+    print_confirmation('PRODUCTION')
+    if confirmed?
+      sh(HEROKU_PRODUCTION_DEPLOY)
+    else
+      puts 'Cancelling release.'
+    end
+  end
+end