name: Build und Push Docker Image

on:
  push:
    branches: [main]
    tags: ["v*"]

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    steps:
      - name: Code auschecken
        uses: actions/checkout@v4

      - name: Bei der Registry anmelden
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ${{ github.server_url }} -u ${{ github.actor }} --password-stdin
        env:
          # Bei Gitea/Forgejo zeigt github.server_url auf die eigene Instanz,
          # z.B. https://git.meinefirma.de
          DUMMY: ""

      - name: Image-Namen bestimmen
        id: vars
        run: |
          REGISTRY_HOST=$(echo "${{ github.server_url }}" | sed -E 's#https?://##')
          IMAGE="$REGISTRY_HOST/${{ github.repository }}"
          echo "image=$IMAGE" >> "$GITHUB_OUTPUT"

      - name: Image bauen
        run: docker build -t ${{ steps.vars.outputs.image }}:latest -t ${{ steps.vars.outputs.image }}:${{ github.sha }} .

      - name: Image pushen
        run: |
          docker push ${{ steps.vars.outputs.image }}:latest
          docker push ${{ steps.vars.outputs.image }}:${{ github.sha }}