chore: added article about listing images from ghcr.io

knowledge base/list image tags from ghcr.io.md

@@ -0,0 +1,29 @@
+# List image tags from ghcr.io
+
+## Table of contents <!-- omit in toc -->
+
+1. [TL:DR](#tldr)
+1. [Further readings](#further-readings)
+
+## TL:DR
+
+Use the `tags/list` endpoint to grab all available tags:
+
+```sh
+$ curl https://ghcr.io/token\?scope\="repository:jbruchon/jdupes:pull"
+{"token":"djE…MjA="}
+
+$ curl https://ghcr.io/v2/jbruchon/jdupes/tags/list \
+    -H "Authorization: Bearer djE…MjA="
+{"name":"jbruchon/jdupes","tags":["latest","master","alpine","master-alpine"]}
+```
+
+## Further readings
+
+- [How to check if a container image exists on GHCR?]
+
+<!-- project's references -->
+<!-- internal references -->
+
+<!-- external references -->
+[how to check if a container image exists on ghcr?]: https://github.com/orgs/community/discussions/26279#discussioncomment-3251171