好巧，我刚好在看 gitea action 发布镜像倒 gitea 自身的软件包里，应该也可以看看，反正 github 和 gitea action 基本是兼容的：
```
name: Build test image
run-name: ${{ github.actor }} is testing out Gitea Actions
on:
push:
tags:
- v*
jobs:
build:
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Login to gitea
uses: docker/login-action@v3
with:
registry:
example.com username: test
password: password
- name: Build and push
uses: docker/build-push-action@v5
with:
push: true
tags:
example.com/test/test-image:${{github.ref_name}}
```