diff --git a/config/environments/development.rb b/config/environments/development.rb
new file mode 100644
index 000000000..0b31f5828
--- /dev/null
+++ b/config/environments/development.rb
@@ -0,0 +1,76 @@
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  # In the development environment your application's code is reloaded on
+  # every request. This slows down response time but is perfect for development
+  # since you don't have to restart the web server when you make code changes.
+  config.cache_classes = false
+
+  # Do not eager load code on boot.
+  config.eager_load = false
+
+  # Show full error reports.
+  config.consider_all_requests_local = true
+
+  # Enable/disable caching. By default caching is disabled.
+  # Run rails dev:cache to toggle caching.
+
+  config.cache_store = :file_store, "#{Rails.root }/files/cache_store/"
+
+  # if Rails.root.join('tmp', 'caching-dev.txt').exist?
+  #   config.action_controller.perform_caching = true
+  #
+  #   config.cache_store = :memory_store
+  #   config.public_file_server.headers = {
+  #     'Cache-Control' => "public, max-age=#{2.days.to_i}"
+  #   }
+  # else
+  #   config.action_controller.perform_caching = false
+  #
+  #   config.cache_store = :null_store
+  # end
+
+  # Store uploaded files on the local file system (see config/storage.yml for options)
+  config.active_storage.service = :local
+
+  # Don't care if the mailer can't send.
+  config.action_mailer.raise_delivery_errors = false
+
+  config.action_mailer.perform_caching = false
+
+  # Print deprecation notices to the Rails logger.
+  config.active_support.deprecation = :log
+
+  # Raise an error on page load if there are pending migrations.
+  config.active_record.migration_error = :page_load
+
+  # Highlight code that triggered database queries in logs.
+  config.active_record.verbose_query_logs = true
+
+  # Debug mode disables concatenation and preprocessing of assets.
+  # This option may cause significant delays in view rendering with a large
+  # number of complex assets.
+  config.assets.debug = true
+
+  # Suppress logger output for asset requests.
+  config.assets.quiet = true
+
+  # Raises error for missing translations
+  # config.action_view.raise_on_missing_translations = true
+
+  # Use an evented file watcher to asynchronously detect changes in source code,
+  # routes, locales, etc. This feature depends on the listen gem.
+  config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+
+  config.action_controller.perform_caching = true
+
+  config.action_mailer.delivery_method = :smtp
+  config.action_mailer.smtp_settings = {
+      address:              'smtp.exmail.qq.com',
+      port:                  25,
+      domain:               'smtp.qq.com',
+      user_name:            'educoder@trustie.org',
+      password:             'mAZc9EWbe2Kawaqo2',
+      authentication:       'login',
+      enable_starttls_auto: true  }
+end