Referencing API policies and best practices (#286)

* referencing API policies and best practices

* adding new line as per formatting rules

* referencing API policies and best practices

* adding new line as per formatting rules

* updating file name for consistency

Author: walteck

practices/api-policies.md

@@ -0,0 +1,9 @@
+# API policies and best practice
+
+## Context
+
+These notes are part of a broader set of [principles](../principles.md). See also [cloud services](cloud-services.md).
+
+## Details
+
+NHSDigital has published guidance on [policies and best practices](https://digital.nhs.uk/developer/guides-and-documentation/api-policies-and-best-practice) around APIs. For projects using APIs, development and engineerng teams should review these guides to assist in building good quality, easy to use healthcare APIs.

quickstart.md

@@ -26,7 +26,7 @@ This contains cloneable scripts, docker files, and pipeline steps that can be ad
 The entire team should familiarise themselves with the Framework's [Principles](principles.md).
 And with the common [Patterns](patterns) that help achieve those Principles.
 
-Specialists should familiarise themselves with [best Practices](practices) in their areas.
+Specialists should familiarise themselves with [best Practices](practices) in their areas. Teams building APIs should refer to the [policies and best practice guidance](https://digital.nhs.uk/developer/guides-and-documentation/api-policies-and-best-practice) on building APIs.
 
 Run a quality review every 3 months to keep track of progress.