docs: 添加 MIT 许可证

将 service 文件放到安装目录,再软链接到 /etc/systemd/system,
便于更新时只改安装目录内的文件

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 M1saka
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

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:
@@ -51,11 +66,14 @@ 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
-sudo cp docker-compose-backup.service /etc/systemd/system/
+sudo cp docker-compose-backup.service /opt/docker-compose-backup/docker-compose-backup.service
+sudo ln -sf /opt/docker-compose-backup/docker-compose-backup.service /etc/systemd/system/docker-compose-backup.service
 sudo systemctl daemon-reload
 sudo systemctl enable --now docker-compose-backup
 ```
@@ -100,6 +118,10 @@ projects:
 
 Environment variables in `${VAR}` form are expanded automatically.
 
+## License
+
+MIT. See [LICENSE](LICENSE).
+
 `exclude` uses Go `filepath.Match` patterns and also matches each file/directory basename. It is **not** full `.gitignore` syntax: `**` and negation rules like `!foo` are not supported.
 
 ## Commands
@@ -121,4 +143,4 @@ Global flags:
 ## Requirements
 
 - Docker CLI accessible on `PATH`
-- Go 1.26+ (to build from source)
+- Go 1.26+ (to build from source)