Add build script

bin/build_release

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+set -euo pipefail
+
+SANDBOX=$(mktemp -d)
+PACKAGE=github.com/remove-bg/go
+
+printf "Building Linux...\n"
+GOOS=linux go build -o "$SANDBOX/removebg-linux" $PACKAGE
+
+printf "Building MacOS...\n"
+GOOS=darwin go build -o "$SANDBOX/removebg-macos" $PACKAGE
+
+printf "Building Windows...\n"
+GOOS=windows go build -o "$SANDBOX/removebg.exe" $PACKAGE
+
+printf "\nBuild summary:\n"
+find "$SANDBOX" -type f -exec file {} \;
+
+printf "\nSHA-1 digests for CF cli plugin repo:\n"
+shasum $SANDBOX/removebg*
+
+printf "\nBinaries are located here:\n$SANDBOX\n"
+open "$SANDBOX"