feat: add a script to build binary files for Linux/macOS/Windows

build.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+set -eu
+
+BINARY_NAME=mhnow-bot
+BUILD_DIR=./build
+declare -r BINARY_NAME
+declare -r BUILD_DIR
+
+if [[ ! -e "${BUILD_DIR}" ]]; then
+    mkdir -p "${BUILD_DIR}"
+fi
+
+GOOS=linux   GOARCH=amd64 go build -o "${BUILD_DIR}/${BINARY_NAME}_linux_x86_64" ./main.go
+GOOS=linux   GOARCH=arm64 go build -o "${BUILD_DIR}/${BINARY_NAME}_linux_arm64" ./main.go
+GOOS=windows GOARCH=amd64 go build -o "${BUILD_DIR}/${BINARY_NAME}_windows_x86_64.exe" ./main.go
+GOOS=darwin  GOARCH=arm64 go build -o "${BUILD_DIR}/${BINARY_NAME}_macos_arm64" ./main.go