added mails placeholders to dockerfile staging

Author: OlegPhenomenon

Dockerfile.staging

@@ -63,6 +63,8 @@ RUN cp config/application.yml.sample config/application.yml && \
 
 # Precompile assets
 RUN RAILS_ENV=staging SECRET_KEY_BASE=dummy_for_assets \
+    ACTION_MAILER_DEFAULT_HOST=dummy.host \
+    ACTION_MAILER_DEFAULT_FROM=dummy@example.com \
     bundle exec rails assets:precompile && \
     echo "Assets precompiled successfully for staging" && \
     ls -la public/assets/ | head -20