Update logo

Author: ldalves

README.md

@@ -1,6 +1,10 @@
 <!-- Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. -->
 
-![Vespa Cloud logo](https://cloud.vespa.ai/assets/logos/vespa-cloud-logo-full-black.png)
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="https://vespa.ai/assets/vespa-ai-logo-heather.svg">
+  <source media="(prefers-color-scheme: light)" srcset="https://vespa.ai/assets/vespa-ai-logo-rock.svg">
+  <img alt="#Vespa" width="200" src="https://vespa.ai/assets/vespa-ai-logo-rock.svg" style="margin-bottom: 25px;">
+</picture>
 
 # Vespa Cloud sample applications - CORD-19 Search
 
@@ -30,3 +34,6 @@ $ curl "https://api.cord19.vespa.ai/search/?query=sars-cov-2"
 </pre>
 
 <!-- Moved from https://github.com/vespa-engine/sample-apps/blob/a5a5fea369554691ef61d3e26c9337c878a0b2ea/vespa-cloud/cord-19-search/README.md -->
+
+
+vespa-cloud/vespa-documentation-search

experiment-yourself.md

@@ -1,6 +1,10 @@
 <!-- Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. -->
 
-![Vespa logo](https://vespa.ai/assets/vespa-logo-color.png)
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="https://vespa.ai/assets/vespa-ai-logo-heather.svg">
+  <source media="(prefers-color-scheme: light)" srcset="https://vespa.ai/assets/vespa-ai-logo-rock.svg">
+  <img alt="#Vespa" width="200" src="https://vespa.ai/assets/vespa-ai-logo-rock.svg" style="margin-bottom: 25px;">
+</picture>
 
 
 The Vespa app that powers [CORD-19 Search](https://cord19.vespa.ai/) is 

feeding.md

@@ -1,6 +1,10 @@
 <!-- Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. -->
 
-![Vespa logo](https://vespa.ai/assets/vespa-logo-color.png)
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="https://vespa.ai/assets/vespa-ai-logo-heather.svg">
+  <source media="(prefers-color-scheme: light)" srcset="https://vespa.ai/assets/vespa-ai-logo-rock.svg">
+  <img alt="#Vespa" width="200" src="https://vespa.ai/assets/vespa-ai-logo-rock.svg" style="margin-bottom: 25px;">
+</picture>
 
 ## Prerequisites
 Python3 installed and two packages to parse and produce Vespa json feed