added ppc64le platform support (#53)

Co-authored-by: Andrea Esposito <[email protected]>

Author: roy20021

.github/workflows/dockerimage.yml

@@ -8,7 +8,7 @@ on:
       - "v*"
 
 env:
-  DOCKER_BUILDX_PLATFORMS: linux/amd64,linux/arm64/v8,linux/arm/v7,linux/arm/v6
+  DOCKER_BUILDX_PLATFORMS: linux/amd64,linux/arm64/v8,linux/arm/v7,linux/arm/v6,linux/ppc64le
 
 jobs: