feat: build docker image on push

.gitea/workflows/build_docker.yaml

@@ -0,0 +1,59 @@
+name: Build Docker Image
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - docker/**
+  workflow_dispatch:
+
+jobs:
+  release-image:
+    runs-on: skylab
+    container:
+      image: catthehacker/ubuntu:act-latest
+    env:
+      DOCKER_ORG: teacup
+      DOCKER_LATEST: nightly
+      RUNNER_TOOL_CACHE: /toolcache
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker BuildX
+        uses: docker/setup-buildx-action@v2
+        with:
+          config-inline: |
+            [registry."https://gitea.ditmarvisser.net"] 
+              http = true
+              insecure = true
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          registry: https://gitea.ditmarvisser.net
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Get Meta
+        id: meta
+        run: |
+          echo REPO_NAME=$(echo ${GITHUB_REPOSITORY} | awk -F"/" '{print $2}') >> $GITHUB_OUTPUT
+          echo REPO_VERSION=$(git describe --tags --always | sed 's/^v//') >> $GITHUB_OUTPUT
+
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: |
+            linux/amd64
+            linux/arm64
+          push: true
+          tags: |
+            https://gitea.ditmarvisser.net/${{ env.DOCKER_ORG }}/${{ steps.meta.outputs.REPO_NAME }}:${{ steps.meta.outputs.REPO_VERSION }}
+            https://gitea.ditmarvisser.net/${{ env.DOCKER_ORG }}/${{ steps.meta.outputs.REPO_NAME }}:${{ env.DOCKER_LATEST }}

README.md

@@ -1,2 +1,3 @@
 # les-06
 
+https://about.gitea.com/resources/tutorials/automating-release-versioning-with-gitea-actions-to-the-gitea-package-registry

docker/Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine:3.22.0
+
+CMD ["echo", "Hello, World!"]

docker/app.py

@@ -0,0 +1 @@
+print("Hello, World!")