feat: Add OCI label to link package to repository

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

@@ -19,6 +19,8 @@ RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o /app/serv
 # 运行阶段
 FROM alpine:3.18
 
+LABEL org.opencontainers.image.source="https://gitea.likegears.com/likegears/material_texture"
+
 WORKDIR /app
 
 # 安装必要的运行时依赖