docs: 下载链接改为 latest release 地址

安装与 systemd 部署章节改用 Gitea latest release 的下载链接,
省去从源码构建

README.md

@@ -13,6 +13,21 @@ A backup tool for Docker Compose projects with **minimal downtime** — stop, co
 
 ## Installation
 
+### Download a pre-built binary (recommended)
+
+Download the latest release for your architecture:
+
+```bash
+# linux amd64
+curl -fsSL -o docker-compose-backup https://git.misaka.ren/m1saka/docker-compose-backup/releases/download/latest/docker-compose-backup-linux-amd64
+# linux arm64
+curl -fsSL -o docker-compose-backup https://git.misaka.ren/m1saka/docker-compose-backup/releases/download/latest/docker-compose-backup-linux-arm64
+
+chmod +x docker-compose-backup
+```
+
+### Build from source
+
 ```bash
 go build -o docker-compose-backup .
 # or cross-compile:
@@ -51,7 +66,9 @@ This repository includes `docker-compose-backup.service`, configured for install
 
 ```bash
 sudo mkdir -p /opt/docker-compose-backup
-sudo cp docker-compose-backup-linux-arm64 /opt/docker-compose-backup/docker-compose-backup
+# Download the latest release (pick amd64 or arm64 to match the host):
+sudo curl -fsSL -o /opt/docker-compose-backup/docker-compose-backup \
+  https://git.misaka.ren/m1saka/docker-compose-backup/releases/download/latest/docker-compose-backup-linux-arm64
 sudo chmod +x /opt/docker-compose-backup/docker-compose-backup
 sudo cp config.yaml /opt/docker-compose-backup/config.yaml
 sudo mkdir -p /opt/docker-compose-backup/backups /opt/docker-compose-backup/tmp