Update install.tmpl

Author: kerwin612

templates/install.tmpl

@@ -338,7 +338,7 @@
 
 					<div class="inline field">
 						<div class="right-content">
-							These configuration options will be written into: {{.CustomConfFile}}
+							These configuration options will be written into: <span class="ui label">{{.CustomConfFile}}</span> <button class="btn interact-fg" data-clipboard-text="{{.CustomConfFile}}">{{svg "octicon-copy" 14}}</button>
 						</div>
 						<div class="tw-mt-4 tw-mb-2 tw-text-center">
 							<button class="ui primary button">{{ctx.Locale.Tr "install.install_btn_confirm"}}</button>