update

Dockerfile

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+# ---- 构建阶段 ----
+FROM golang:1.26-alpine AS build
+WORKDIR /src
+
+# 先拉依赖，利用层缓存
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+# 静态链接，便于在 alpine 运行时直接运行
+RUN CGO_ENABLED=0 GOOS=linux go build -o /out/server ./cmd/server
+
+# ---- 运行阶段 ----
+FROM alpine:3.20
+RUN apk add --no-cache ca-certificates tzdata
+
+WORKDIR /app
+COPY --from=build /out/server /app/server
+COPY configs ./configs
+
+# 上传目录（容器外挂 volume）
+RUN mkdir -p /app/uploads
+
+ENV CONFIG_PATH=/app/configs/config.yml
+EXPOSE 8090
+
+CMD ["/app/server"]