docs: add docs to marketplace

Signed-off-by: Owen Rumney <[email protected]>

Dockerfile

@@ -31,7 +31,7 @@ LABEL org.opencontainers.image.title="Aqua Trivy" \
     com.docker.extension.publisher-url="https://trivy.dev" \
     com.docker.extension.screenshots="[{\"alt\": \"Trivy Dark Screenshot\", \"url\": \"https://raw.githubusercontent.com/aquasecurity/trivy-docker-extension/main/.github/images/screenshot.png\"},{\"alt\": \"Trivy light screenshot\", \"url\": \"https://raw.githubusercontent.com/aquasecurity/trivy-docker-extension/main/.github/images/screenshot_light.png\"}]" \
     com.docker.extension.detailed-description="<h1>Free and Unlimited Vulnerability Scanning</h1><h3>Take control of your application security with Trivy</h3>Trivy is the world’s most popular open source vulnerability and misconfiguration scanner. It is reliable, fast, extremely easy to use, and it works wherever you need it. <ul><li>Scan locally stored images by chosing from the list</li><li>Scan remote images simply by entering the name in the search box</li><li>Filter by the severity of the vulnerability or optionally only show issues with fixes</li></ul>" \
-    com.docker.extension.additional-urls=[{"title":"Trivy Website","url":"https://trivy.dev/"},{"title":"Issues","url":"https://github.com/aquasecurity/trivy/issues"},{"title":"Slack","url":"https://slack.aquasec.com/"}]
+    com.docker.extension.additional-urls="[{\"title\":\"Trivy Website\",\"url\":\"https://trivy.dev/\"},{\"title\":\"Issues\",\"url\":\"https://github.com/aquasecurity/trivy/issues\"},{\"title\":\"Slack\",\"url\":\"https://slack.aquasec.com/\"}]"
 
 COPY --from=client-builder /app/client/dist ui
 COPY --from=service-builder /plugin/bin/creds-service /