[#473] Optimize generating flow

.template/addons/openapi/template.rb

@@ -9,7 +9,7 @@
 copy_file '.spectral.yml'
 copy_file 'public/openapi.html'
 
-if yes?(install_addon_prompt('Mock Server'))
+if @install_mock_server
   @install_mock_server = true
   copy_file 'fly.toml'
   copy_file 'Dockerfile.mock'

template.rb

@@ -65,22 +65,10 @@ def apply_template!(template_root)
   DEFAULT_ADDONS.each_key do |addon|
     apply ".template/addons/#{addon}/template.rb"
   end
-
   post_default_addons_install
 
-  # Add-ons - [Optional]
-  if yes?(install_addon_prompt('Github Action and Wiki'))
-    @install_github_action = true
-    apply '.template/addons/github/template.rb'
-  end
-  if API_VARIANT || yes?(install_addon_prompt('OpenAPI'))
-    @install_openapi = true
-    apply '.template/addons/openapi/template.rb'
-  end
-  apply '.template/addons/semaphore/template.rb' if yes?(install_addon_prompt('SemaphoreCI'))
-  apply '.template/addons/nginx/template.rb' if yes?(install_addon_prompt('Nginx'))
-  apply '.template/addons/phrase/template.rb' if yes?(install_addon_prompt('Phrase'))
-  apply '.template/addons/devise/template.rb' if yes?(install_addon_prompt('Devise'))
+  ask_for_optional_addons
+  apply_optional_addons
 
   # Variants
   apply '.template/variants/api/template.rb' if API_VARIANT
@@ -91,6 +79,25 @@ def apply_template!(template_root)
   apply '.template/hooks/before_complete/report.rb'
 end
 
+def ask_for_optional_addons
+  @install_github_action = true if yes?(install_addon_prompt('Github Action and Wiki'))
+  @install_openapi = true if API_VARIANT || yes?(install_addon_prompt('OpenAPI'))
+  @install_mock_server if @install_openapi && yes?(install_addon_prompt('Mock Server'))
+  @install_semaphore = true if yes?(install_addon_prompt('SemaphoreCI'))
+  @install_nginx = true if yes?(install_addon_prompt('Nginx'))
+  @install_phrase = true if yes?(install_addon_prompt('Phrase'))
+  @install_devise = true if yes?(install_addon_prompt('Devise'))
+end
+
+def apply_optional_addons
+  apply '.template/addons/github/template.rb' if @install_github_action
+  apply '.template/addons/openapi/template.rb' if @install_openapi
+  apply '.template/addons/semaphore/template.rb' if @install_semaphore
+  apply '.template/addons/nginx/template.rb' if @install_nginx
+  apply '.template/addons/phrase/template.rb' if @install_phrase
+  apply '.template/addons/devise/template.rb' if @install_devise
+end
+
 # Set Thor::Actions source path for looking up the files
 def source_paths
   @source_paths