chore: add icons to demo sites

README.md

@@ -5,12 +5,18 @@ This page is part of the [did:hack](https://didhack.xyz/) hackathon project
 demonstrates a website with a well-known decentralized identifier that offers a
 publicly accessible and valid Verifiable Presentation / Credential.
 
-## Sites
+## Demo Sites
 
-- [DID present, Verifiable Credential broken](https://broken-example.identinet.io)
-- [Just a did:web DID](https://id-example.identinet.io)
-- [No DID](https://no-id-example.identinet.io)
-- [DID present, Verifiable Credential valid](https://id-plus-example.identinet.io)
+- <img alt="no id" src="./icons/shield-slash.svg" style="height: 1em;" />
+  <a href="https://no-id-example.identinet.io">No DID</a>
+- <img alt="verification success" src="./icons/shield-plus.svg" style="height: 1em;" />
+  <a href="https://id-example.identinet.io">Just a did:web DID</a>
+- <img alt="verification success" src="./icons/shield-plus.svg" style="height: 1em;" />
+  <a href="https://id-plus-example.identinet.io">DID present, Verifiable
+  Credential valid</a>
+- <img alt="verification failed" src="./icons/shield-xmark.svg" style="height: 1em;" />
+  <a href="https://broken-example.identinet.io">DID present, Verifiable
+  Credential broken</a>
 
 ## Files