support bazel complie this project and format code.

tool/output/BUILD

@@ -0,0 +1,18 @@
+# please run `bazel run //tool/output:container`
+
+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library")
+
+cc_library(
+    name = "output_container",
+    hdrs = ["output_container.h"],
+    copts = ["-std=c++17"],
+)
+
+cc_binary(
+    name = "container",
+    srcs = ["container.cpp"],
+    deps = [
+        ":output_container",
+    ],
+    copts = ["-std=c++17"],
+)