Build amd64 and arm64 for docker images

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build amd64 and arm64 images for multi-platform support

docker buildx for multiarch support

create a builder

because the default builder doesn't support multi-arch building,
create a new builder with docker-container driver and use it

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docker buildx create  --use --name multiarch --driver docker-container

if your self-build registry is not https, please touch a buildkitd.toml

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[registry."your-registry-domain or ip"]
http = true
insecure = true

and then use this config to create a builder

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# if your builder has already existed, delete it and create
docker buildx rm multiarch
docker buildx create  --use --name multiarch --driver docker-container --config ./buildkitd.toml

build the multiarch image and push it to your registry

docker buildx inspect --bootstrap to get the supported platform information

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# don't ignore the trailing dot, it's to search the current directory's Dockerfile file
docker buildx build --push --platform linux/amd64,linux/arm64 -t pplmx/demo:v2.0.0 .

# if you wanna to specify a Dockerfile
docker buildx build --push --platform linux/amd64,linux/arm64 -t pplmx/demo:v2.0.0 -f ./Dockerfile