Amend phase banner to point to intermediary feedback page

.eleventy.js

@@ -136,7 +136,7 @@ module.exports = function(eleventyConfig) {
         tag: {
           text: "Alpha"
         },
-        html: 'This is a new service – your <a class="govuk-link" target="_blank" href="https://www.homeofficesurveys.homeoffice.gov.uk/s/8PDDG2/">feedback (opens in a new tab)</a> will help us to improve it.'
+        html: 'This is a new service – your <a class="govuk-link" target="_blank" href="' + _customPathPrefix + '/provide-feedback/">feedback (opens in a new tab)</a> will help us to improve it.'
       }
     });
 

docs/provide-feedback.md

@@ -0,0 +1,22 @@
+---
+eleventyExcludeFromCollections: true
+layout: page
+order: 5
+title: Provide feedback
+description:
+tags:
+---
+
+We welcome feedback on all content in the site, or on any other areas that we can improve. There are two ways that you can provide feedback to us.
+
+## Raise an issue on our GitHub repository
+
+This is the preferred option. If you raise an issue on our repository you can easily track our response and progress when addressing it.
+
+You will need a GitHub account in order to create an issue, which will involve agreeing to [GitHub's privacy policy](https://docs.github.com/en/site-policy/privacy-policies/github-privacy-statement).
+
+[Raise an issue on our GitHub repository](https://github.com/HO-CTO/engineering-guidance-and-standards/issues/new/choose)
+
+## Get in touch directly
+
+If you do not want to raise an issue on GitHub then you can contact the members of our engineering community that maintain the site at [[email protected]](mailto:[email protected]).