refactor: enhance Docker CLI installation and build process in publish-image workflow

.gitea/workflows/publish-image.yml

@@ -17,10 +17,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Install Docker CLI
+      - name: Install Docker CLI + Buildx
         shell: sh
         run: |
-          apk add --no-cache docker-cli
+          apk add --no-cache docker-cli docker-cli-buildx
 
       - name: Build image metadata
         id: meta
@@ -73,13 +73,11 @@ jobs:
           REF_TYPE="${GITHUB_REF_TYPE}"
           REF_NAME="${GITHUB_REF_NAME}"
 
-          TAG_ARGS="-t $IMAGE:$SHA_TAG"
+          TAG_ARGS="--tag $IMAGE:$SHA_TAG"
-          PUSH_TAGS="$SHA_TAG"
 
           # latest only for pushes to main
           if [ "$REF_TYPE" = "branch" ] && [ "$REF_NAME" = "main" ]; then
-            TAG_ARGS="$TAG_ARGS -t $IMAGE:latest"
+            TAG_ARGS="$TAG_ARGS --tag $IMAGE:latest"
-            PUSH_TAGS="$PUSH_TAGS latest"
           fi
 
           # semver tags for refs like v1.2.3 -> v1.2.3, v1.2, v1
@@ -88,18 +86,13 @@ jobs:
               v[0-9]*.[0-9]*.[0-9]*)
                 MAJOR="$(echo "$REF_NAME" | cut -d. -f1)"
                 MINOR="$(echo "$REF_NAME" | cut -d. -f2)"
-                TAG_ARGS="$TAG_ARGS -t $IMAGE:$REF_NAME -t $IMAGE:$MAJOR.$MINOR -t $IMAGE:$MAJOR"
+                TAG_ARGS="$TAG_ARGS --tag $IMAGE:$REF_NAME --tag $IMAGE:$MAJOR.$MINOR --tag $IMAGE:$MAJOR"
-                PUSH_TAGS="$PUSH_TAGS $REF_NAME $MAJOR.$MINOR $MAJOR"
                 ;;
               *)
-                TAG_ARGS="$TAG_ARGS -t $IMAGE:$REF_NAME"
+                TAG_ARGS="$TAG_ARGS --tag $IMAGE:$REF_NAME"
-                PUSH_TAGS="$PUSH_TAGS $REF_NAME"
                 ;;
             esac
           fi
 
-          docker build $TAG_ARGS .
+          docker buildx version
-
+          docker buildx build --push $TAG_ARGS .
-          for TAG in $PUSH_TAGS; do
-            docker push "$IMAGE:$TAG"
-          done