Test alternative build method

.gitea/workflows/build.yml

@@ -7,6 +7,7 @@ jobs:
   # Build image and push to container registry
   docker-build:
     runs-on: ubuntu-20.04
+    name: Build and Push
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -27,13 +28,13 @@ jobs:
           password: ${{ secrets.REGISTRY_TOKEN }}
 
       - name: Prepare build environment
-        run: docker build --tag monero:build-env-linux --build-arg THREADS=3 --file Dockerfile.linux .
+        run: docker buildx build --tag monero:build-env-linux --build-arg THREADS=3 --file Dockerfile.linux .
 
       - name: Build
         run: |
-          docker run --rm --name build-container \
-          -v /workspace/Bill/monero-gui:/monero-gui:rshared \
-          -w /monero-gui monero:build-env-linux sh -c 'make release-static -j3'
+          docker buildx build --output type=local,dest=. \
+          monero:build-env-linux --build-arg THREADS=3 --file Dockerfile.linux \
+          sh -c 'make release-static -j3'
 
       - name: sha256sum
         run: shasum -a256 /workspace/Bill/monero-gui/build/release/bin/monero-wallet-gui