fix: Docker 生产部署构建上下文 — 统一 Dockerfile 从仓库根复制 shared pkg

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/memory-service/Dockerfile

@@ -1,19 +1,37 @@
-# Build stage
+# ========== 构建阶段 ==========
 FROM golang:1.26-alpine AS builder
 
-WORKDIR /app
-COPY go.mod go.sum ./
-RUN go mod download
-COPY . .
-RUN CGO_ENABLED=0 GOOS=linux go build -o /memory-service ./cmd/
+RUN apk add --no-cache git ca-certificates
 
-# Runtime stage
+WORKDIR /app
+
+# 复制服务代码 + 共享 pkg（保持目录结构以匹配 go.mod replace 路径）
+COPY backend/memory-service/ ./backend/memory-service/
+COPY backend/pkg/ ./backend/pkg/
+
+WORKDIR /app/backend/memory-service
+RUN go mod download
+
+# 编译 (静态链接)
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /memory-service ./cmd/
+
+# ========== 运行阶段 ==========
 FROM alpine:3.21
 
-RUN apk --no-cache add ca-certificates
+RUN apk add --no-cache ca-certificates tzdata && \
+    cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
+    echo "Asia/Shanghai" > /etc/timezone
+
 WORKDIR /app
+
 COPY --from=builder /memory-service .
 
+RUN adduser -D -H cyrene
+USER cyrene
+
 EXPOSE 8091
 
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD wget --no-verbose --tries=1 --spider http://localhost:8091/api/v1/health || exit 1
+
 ENTRYPOINT ["./memory-service"]