doc: add link to README to docs for clarity (notaryproject#636)

Added link to official docs to make it easier to find and navigate to
when users come across this project and updated link to ACR docs.

Signed-off-by: Zach Rhoads <[email protected]>

README.md

@@ -6,6 +6,8 @@
 
 Notation is a CLI project to add signatures as standard items in the registry ecosystem, and to build a set of simple tooling for signing and verifying these signatures. This should be viewed as similar security to checking git commit signatures, although the signatures are generic and can be used for additional purposes. Notation is an implementation of the [Notary project specifications][notaryv2-specs].
 
+> **Note** The documentation for using `notation` is available [here](https://notaryproject.dev/docs/).
+
 ## Table of Contents
 
   - [Documents](#documents)
@@ -20,7 +22,7 @@ Notation is a CLI project to add signatures as standard items in the registry ec
 ## Documents
 
 - [Quick start: Sign and validate a container image](https://notaryproject.dev/docs/quickstart/)
-- [Build, sign, and verify container images using Notary and Azure Key Vault](https://docs.microsoft.com/azure/container-registry/container-registry-tutorial-sign-build-push)
+- [Build, sign, and verify container images using Notary and Azure Key Vault](https://docs.microsoft.com/azure/container-registry/container-registry-tutorial-sign-build-push?wt.mc_id=azurelearn_inproduct_oss_notaryproject)
 
 ## Community