Unable to build S3 example using provided instructions

从提供的 Dockerfile 和 S3 示例的构建说明开始，然后使用 make 重现失败，并检查相关的 CMake 构建配置。更新说明以反映可正常工作的构建流程，并验证按照文档中的步骤可以成功构建 S3 示例。

The instructions say to use the provided Dockerfile to build the S3 example. However, it looks like something has changed as the build now fails:

# make
Scanning dependencies of target encoder
[ 50%] Building CXX object CMakeFiles/encoder.dir/main.cpp.o
[100%] Linking CXX executable encoder
/usr/include/c++/9.3.0/ext/string_conversions.h: In function '__to_xstring.constprop':
/usr/include/fortify/stdio.h:70:28: error: inlining failed in call to always_inline 'vsnprintf': function body can be overwritten at link time
   70 | _FORTIFY_FN(vsnprintf) int vsnprintf(char *__s, size_t __n, const char *__f,
      |                            ^
/usr/include/c++/9.3.0/ext/string_conversions.h:111:32: note: called from here
  111 |       const int __len = __convf(__s, __n, __fmt, __args);
      |                                ^
lto-wrapper: fatal error: /usr/bin/c++ returned 1 exit status
compilation terminated.
/usr/lib/gcc/x86_64-alpine-linux-musl/9.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/encoder.dir/build.make:116: encoder] Error 1
make[1]: *** [CMakeFiles/Makefile2:97: CMakeFiles/encoder.dir/all] Error 2
make: *** [Makefile:104: all] Error 2

Please provide updated instructions for building the S3 example.