modified make.bash to take arguments as environemt variables

Dockerfile

@@ -1,5 +1,6 @@
 ARG BUILDPLATFORM=$BUILDPLATFORM
-FROM --platform=$BUILDPLATFORM golang:1.18 AS psiphon_builder
+ARG GO_VERSION=$GO_VERSION
+FROM --platform=$BUILDPLATFORM golang:$GO_VERSION AS psiphon_builder
 WORKDIR /go
 LABEL stage=builder
 ARG VERSION=2.0.23

base/etc/services.d/psiphon/finish

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+if test "$1" -eq 256 ; then
+  e=$((128 + $2))
+else
+  e="$1"
+fi
+
+echo "$e" > /run/s6-linux-init-container-results/exitcode

make.bash

@@ -1,11 +1,13 @@
 #!/bin/bash
 
-TARGETS="linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6"
-VERSION=2.0.29
+MK_TARGETS=${TARGETS:-"linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6"}
+MK_VERSION=${VERSION:-2.0.30}
+MK_GO_VERSION=${GO_VERSION:-1.20}
 
 sudo docker buildx build \
-				--build-arg TARGETS=${TARGETS} \
-				--build-arg VERSION=${VERSION} \
-				-t swarupsengupta2007/psiphon:${VERSION} \
+				--build-arg TARGETS=${MK_TARGETS} \
+				--build-arg VERSION=${MK_VERSION} \
+				--build-arg GO_VERSION=${MK_GO_VERSION} \
+				-t swarupsengupta2007/psiphon:${MK_VERSION} \
 				-t swarupsengupta2007/psiphon:latest \
-				--platform ${TARGETS} . $1
+				--platform ${MK_TARGETS} . $1