Pulled build script out of Dockerfile to facilitate native builds, changed the base image from alpine-s6 to alpine and used tini as entrypoint

build.sh

@@ -43,28 +43,24 @@ while [[ $# -gt 0 ]]; do
 	esac
 done
 
-source ./lastest_version.sh
+MYPATH=$(dirname "$(readlink -f "$0")")
+source "${MYPATH}/latest_version.sh"
 
 if [[ -z "${PSIPHON_VERSION}" ]]; then
 	PSIPHON_VERSION=$(get_latest_version)
 else
-	if ! validate_version_format "$PSIPHON_VERSION"; then
+	if ! validate_version_format "${PSIPHON_VERSION}"; then
 		echo "Invalid Psiphon version format. Please use 'X.Y.Z' or 'vX.Y.Z' format."
 		exit 1
 	fi
 fi
 
-PSIPHON_VERSION=$(normalize_version "$PSIPHON_VERSION")
+PSIPHON_VERSION=$(normalize_version "${PSIPHON_VERSION}")
 ALL_TARGETS="linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6,windows/amd64,windows/386,darwin/amd64,darwin/arm64"
 CURRENT_TARGET="$(go env GOOS)/$(go env GOARCH)"
 TARGETS=${TARGETS:-"current"}
 
-if [[ "${TARGETS}" == "current" ]]; then
-	TARGETS="${CURRENT_TARGET}"
-elif [[ "${TARGETS}" == "all" ]]; then
-	TARGETS="${ALL_TARGETS}"
-fi
-
+TARGETS=$(decipher_targets "${TARGETS}")
 TARGETS=${TARGETS//,/ }
 
 BUILD_DIR=$(pwd)/tmp_build_$$
@@ -79,20 +75,23 @@ mkdir -p "${BIN_DIR}"
 curl -sL https://github.com/Psiphon-Labs/psiphon-tunnel-core/archive/refs/tags/${PSIPHON_VERSION}.tar.gz | tar xz --strip-components=1 -C "${BUILD_DIR}"
 pushd "${BUILD_DIR}/ConsoleClient" > /dev/null
 
+export CGO_ENABLED=0
+
 for PLATFORM in ${TARGETS}
 do
 	IFS='/' read -r OS ARCH VARIANT <<< "${PLATFORM}"
+	
+	export GOOS=${OS}
+	export GOARCH=${ARCH}
+	if [[ -n "${VARIANT}" ]]; then
+		export GOARM=${VARIANT#v}
+	fi
 	GOEXT=""
 	if [[ "${OS}" == "windows" ]]; then
 		GOEXT=".exe"
 	fi
-
-	GOARM_ENV=""
-	if [[ -n "${VARIANT}" ]]; then
-		GOARM_ENV="GOARM=${VARIANT#v}"
-	fi
-	
-	CGO_ENABLED=0 GOOS=${OS} GOARCH=${ARCH} ${GOARM_ENV} ${GO} build -a -tags netgo -ldflags "-s -w -extldflags '-static'" -o "${BIN_DIR}/psiphon_${PLATFORM//\//_}${GOEXT}"
+	${GO} build -a -tags netgo -ldflags "-s -w -extldflags '-static'" -o "${BIN_DIR}/psiphon_${PLATFORM//\//_}${GOEXT}"
+	unset GOOS GOARCH GOARM
 done
 
 popd > /dev/null