chore: add build script

.gitignore

@@ -1 +1,2 @@
 main
+build/

build.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# 定义输出目录
+OUTPUT_DIR="build"
+mkdir -p ${OUTPUT_DIR}
+
+# Linux amd64
+echo "Building for Linux amd64..."
+GOOS=linux GOARCH=amd64 go build -o ${OUTPUT_DIR}/gh-proxy-go-linux-amd64 main.go
+echo "Output: ${OUTPUT_DIR}/gh-proxy-go-linux-amd64"
+
+# Linux arm64
+echo "Building for Linux arm64..."
+GOOS=linux GOARCH=arm64 go build -o ${OUTPUT_DIR}/gh-proxy-go-linux-arm64 main.go
+echo "Output: ${OUTPUT_DIR}/gh-proxy-go-linux-arm64"
+
+# Linux ARMv7
+echo "Building for Linux ARMv7..."
+GOOS=linux GOARCH=arm GOARM=7 go build -o ${OUTPUT_DIR}/gh-proxy-go-linux-armv7 main.go
+echo "Output: ${OUTPUT_DIR}/gh-proxy-go-linux-armv7"
+
+# Windows amd64
+echo "Building for Windows amd64..."
+GOOS=windows GOARCH=amd64 go build -o ${OUTPUT_DIR}/gh-proxy-go-windows-amd64.exe main.go
+echo "Output: ${OUTPUT_DIR}/gh-proxy-go-windows-amd64.exe"
+
+# macOS amd64
+echo "Building for macOS amd64..."
+GOOS=darwin GOARCH=amd64 go build -o ${OUTPUT_DIR}/gh-proxy-go-macos-amd64 main.go
+echo "Output: ${OUTPUT_DIR}/gh-proxy-go-macos-amd64"
+
+# macOS arm64
+echo "Building for macOS arm64..."
+GOOS=darwin GOARCH=arm64 go build -o ${OUTPUT_DIR}/gh-proxy-go-macos-arm64 main.go
+echo "Output: ${OUTPUT_DIR}/gh-proxy-go-macos-arm64"
+
+echo "Build completed."