在所有 Go 命令中设置 GOTOOLCHAIN=auto

Dockerfile.api

@@ -22,13 +22,13 @@ RUN go mod download
 COPY . .
 
 # 编译 API 服务（静态链接）
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GOTOOLCHAIN=auto go build \
     -ldflags="-w -s" \
     -o /build/api \
     cmd/api/main.go
 
 # 下载 golang-migrate 工具
-RUN go install -tags 'postgres' github.com/golang-migrate/migrate/v4/cmd/migrate@latest
+RUN GOTOOLCHAIN=auto go install -tags 'postgres' github.com/golang-migrate/migrate/v4/cmd/migrate@latest
 
 # ================================
 # 阶段 2: 运行阶段