Add Gitea container image workflow

.gitea/workflows/container-image.yml

@@ -0,0 +1,71 @@
+name: Container Image
+
+on:
+  push:
+    branches:
+      - dev
+      - main
+      - master
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  packages: write
+
+concurrency:
+  group: container-image-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    env:
+      REGISTRY: git.wilkensxl.de
+      IMAGE_NAME: odysseus
+      FALLBACK_OWNER: mrsphay
+      REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
+      GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+
+      - name: Check Docker
+        run: docker version
+
+      - name: Build and push image
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          registry_token="${REGISTRY_TOKEN:-${GITEA_TOKEN:-}}"
+          if [ -z "${registry_token}" ]; then
+            echo "REGISTRY_TOKEN or GITEA_TOKEN is required to publish ${REGISTRY}/${FALLBACK_OWNER}/${IMAGE_NAME}."
+            exit 1
+          fi
+
+          owner="${GITHUB_REPOSITORY_OWNER:-${FALLBACK_OWNER}}"
+          owner="$(printf '%s' "${owner}" | tr '[:upper:]' '[:lower:]')"
+          registry_user="${GITHUB_ACTOR:-${owner}}"
+          image="${REGISTRY}/${owner}/${IMAGE_NAME}"
+          short_sha="$(printf '%s' "${GITHUB_SHA}" | cut -c1-7)"
+          ref_name="${GITHUB_REF_NAME:-dev}"
+          ref_tag="$(printf '%s' "${ref_name}" | tr '[:upper:]' '[:lower:]' | tr -cs 'a-z0-9._-' '-' | sed 's/^-//; s/-$//')"
+
+          echo "${registry_token}" | docker login "${REGISTRY}" --username "${registry_user}" --password-stdin
+
+          docker build --pull \
+            --tag "${image}:sha-${short_sha}" \
+            --tag "${image}:${ref_tag}" \
+            --tag "${image}:latest" \
+            .
+
+          docker push "${image}:sha-${short_sha}"
+          docker push "${image}:${ref_tag}"
+          docker push "${image}:latest"
+
+          {
+            echo "Published image tags:"
+            echo "- ${image}:latest"
+            echo "- ${image}:${ref_tag}"
+            echo "- ${image}:sha-${short_sha}"
+          } >> "${GITHUB_STEP_SUMMARY}"