Dockerfile for Psiphon (multi-arch) docker

Dockerfile

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+FROM --platform=$BUILDPLATFORM golang:1.18 AS psiphon_builder
+WORKDIR /go
+LABEL stage=builder
+ARG VERSION=2.0.23
+ARG BUILDPLATFORM
+ARG BUILDOS
+ARG BUILDARCH
+ARG TARGETS
+ENV DIR=/go/src/github.com/Psiphon-Labs/psiphon-tunnel-core \
+		GO111MODULE=off \
+		CGO_ENABLED=0
+RUN TARGET_PALTFORMS=${TARGETS:-"$BUILDOS/$BUILDARCH"}; \
+		mkdir -p ${DIR} && \
+		curl -sL https://github.com/Psiphon-Labs/psiphon-tunnel-core/archive/refs/tags/v${VERSION}.tar.gz | tar xz -C ${DIR} --strip-components=1 && \
+		(IFS=','; for PLATFORM in $TARGET_PALTFORMS; \
+		do \
+			OS=${PLATFORM%%/*} && \
+			ARCH=${PLATFORM##*/} && \
+			GOOS=${OS} GOARCH=${ARCH} go install -a -tags netgo -ldflags '-w -extldflags "-static"' github.com/Psiphon-Labs/psiphon-tunnel-core/ConsoleClient && \
+			BINARY=$(find /go/bin/* -name "ConsoleClient*") && \
+			mv ${BINARY} /go/psiphon_${OS}_${ARCH};	\
+		done)
+
+FROM alpine:3.16.0
+RUN mkdir -p /psiphon /config 
+ARG TARGETOS
+ARG TARGETARCH
+COPY start_psiphon psiphon.config /psiphon/
+COPY --from=psiphon_builder /go/psiphon_${TARGETOS}_${TARGETARCH} /psiphon/psiphon
+EXPOSE 8080 1080
+VOLUME /config
+CMD ["/bin/sh", "/psiphon/start_psiphon"]