docker fix

ai-chat-service/Dockerfile

@@ -1,22 +1,24 @@
 FROM golang:1.25 AS builder
 
-ENV GOPROXY=https://proxy.golang.com.cn,https://goproxy.cn,direct \
-    GOSUMDB=sum.golang.google.cn \
-    CGO_ENABLED=0 \
+ENV CGO_ENABLED=0 \
     GOOS=linux \
-    GOARCH=amd64
+    GOARCH=amd64 \
+    GOPROXY=https://goproxy.cn|https://proxy.golang.google.cn|direct \
+    GOSUMDB=sum.golang.google.cn
 
 WORKDIR /src/ai-chat-service
 
 COPY go.mod go.sum ./
+
 RUN --mount=type=cache,target=/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
-    go mod download
+    go mod download -x
 
 COPY . .
+
 RUN --mount=type=cache,target=/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
-    go build -o /out/ai-chat-service ./chat-server
+    go build -trimpath -ldflags="-s -w" -o /out/ai-chat-service ./chat-server
 
 FROM alpine:3.18
 
@@ -31,4 +33,4 @@ COPY --from=builder /out/ai-chat-service ./ai-chat-service
 COPY ./docker.config.yaml /app/config.yaml
 
 ENTRYPOINT ["./ai-chat-service"]
-CMD ["--config=config.yaml"]
+CMD ["--config=config.yaml"]