update documentation

README.md

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+
+# Gitea Actions
+
+This repository contains a collection of GitHub/Gitea Actions that I developed for my own projects.
+
+The primary goal of these actions is to eliminate repetitive setup and maintenance steps that would otherwise need to be duplicated across multiple workflows.<br/>
+By centralizing these common tasks, workflows become easier to maintain, more consistent, and less error-prone.
+
+At the moment, these actions are primarily intended for use with Gitea runners, although some of them may also work in other compatible CI environments.
+
+
+## Available Actions
+
+- **[dockerhub description](dockerhub-description/README.md)**  
+  Updates a Docker Hub repository description while automatically installing any required dependencies missing from the runner environment.
+
+- **[setup docker](setup-docker/README.md)**  
+  Installs Docker on the runner and optionally configures Docker Buildx for container build workflows.

dockerhub-description/README.md

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+# dockerhub description
+
 By default, Gitea runner environments do not include the dependencies required by [dockerhub-description](https://github.com/peter-evans/dockerhub-description).<br/>
 This action is a wrapper around `dockerhub-description` that installs the required dependencies before invoking the upstream action, allowing it to run successfully on Gitea runners.
 

setup-docker/README.md

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+# setup docker
+
 By default, many Gitea runner environments do not include a Docker installation.<br/>
 This can be problematic because Docker is required by many container-related workflows, including building, tagging, and publishing container images.