Use composite action in CI

.github/workflows/build.yml

@@ -15,32 +15,4 @@ jobs:
     if: github.repository_owner == 'e621ng'
 
     steps:
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-
-      - name: Login to Github Container Registry
-        uses: docker/login-action@v2
-        with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ github.token }}
-
-      - name: Generate Docker tags
-        uses: docker/metadata-action@v4
-        id: metadata
-        with:
-          images: ghcr.io/e621ng/autocompleted
-          tags: |
-            type=sha,format=long,prefix=
-          flavor: |
-            latest=true
-
-      - name: Build and push
-        uses: docker/build-push-action@v4
-        with:
-          push: true
-          tags: ${{ steps.metadata.outputs.tags }}
-          labels: ${{ steps.metadata.outputs.labels }}
-
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+      - uses: e621ng/e621ng/.github/docker-build-and-push@master