Add more information to README

README.md

@@ -1,7 +1,23 @@
 # Docker images
 
-![Daily build](https://github.com/CatTheHacker/docker-images/workflows/Daily%20build/badge.svg)
+[![Daily build](https://github.com/CatTheHacker/docker-images/workflows/Daily%20build/badge.svg)](https://github.com/CatTheHacker/docker-images/actions?query=workflow%3A%22Daily+build%22)
 
+## When updates will be applied to images
+
+- A package that will be required for action(s) to work properly might be added
+- Any maintainance that will be required due to:
+  - Docker Hub
+  - Quay
+  - GitHub Container Registry
+  - GitHub Actions
+  - Act
+- Performance and/or disk space improvements
+
+## Images available
+
+- github.com/catthehacker/virtual-environments - GitHub Actions runner image containing all possible tools (image is extremely big, 20GB compressed, ~60GB extracted)
+  - `quay.io/catthehacker/virtual-environments:ubuntu-20.04` - this image is updated manually due to amount of changes in github.com/actions/virtual-environments
+  - more to come...
 - `\linux\ubuntu\runner\Dockerfile` - used as base image for [github.com/catthehacker/act](https://github.com/catthehacker/act)
   - ghcr.io (GitHub Container Registry)
     - `ghcr.io/catthehacker/ubuntu:runner-16.04`