Checking out code

Signed-off-by: Arnau Mora Gras <arnyminerz@proton.me>

.github/workflows/build.yml

@@ -20,6 +20,7 @@ jobs:
   build_and_publish:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx