Support for target variant (needed for armv6)

Dockerfile

@@ -9,24 +9,32 @@ ARG TARGETS
 ENV DIR=/go/src/github.com/Psiphon-Labs/psiphon-tunnel-core \
 		GO111MODULE=off \
 		CGO_ENABLED=0
+SHELL ["/bin/bash", "-c"]
 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=${ARCH} go install -a -tags netgo -ldflags '-w -extldflags "-static"' github.com/Psiphon-Labs/psiphon-tunnel-core/ConsoleClient && \
+			ARCH=${PLATFORM#*/} 					&& 	\
+			ARCH=${ARCH%/*} 							&& 	\
+			VERSION=${PLATFORM##*/} 			&& 	\
+			TARGETVARIANT=${VERSION/$ARCH/}		&& 	\
+			VERSION=${TARGETVER/v/} 			&& 	\
+			GOOS=${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};	\
+			mv ${BINARY} /go/psiphon_${OS}_${ARCH}_${TARGETVARIANT};	\
 		done)
 
 FROM alpine:3.16.0
 RUN mkdir -p /psiphon /config 
 ARG TARGETOS
 ARG TARGETARCH
+ARG TARGETVARIANT
 COPY start_psiphon psiphon.config /psiphon/
-COPY --from=psiphon_builder /go/psiphon_${TARGETOS}_${TARGETARCH} /psiphon/psiphon
+COPY --from=psiphon_builder /go/psiphon_${TARGETOS}_${TARGETARCH}_${TARGETVARIANT} /psiphon/psiphon
 EXPOSE 8080 1080
 VOLUME /config
 CMD ["/bin/sh", "/psiphon/start_psiphon"]

README.md

@@ -19,7 +19,7 @@ git clone https://github.com/swarupsengupta2007/psiphon-docker
 3. Build docker image for current platform or multi-arch
 ```bash
 # choose target platforms
-TARGETS="linux/amd64,linux/386,linux/arm64,linux/arm"
+TARGETS="linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6"
 
 # Create a builder instance
 sudo docker buildx create --name cross-platform --platform ${TARGETS} --use