add rules_sass config
diff --git a/buildkite/pipelines/bazelci.py b/buildkite/pipelines/bazelci.py
index fcb3b3c..dded14c 100644
--- a/buildkite/pipelines/bazelci.py
+++ b/buildkite/pipelines/bazelci.py
@@ -122,6 +122,10 @@
           "git_repository": "https://github.com/bazelbuild/rules_rust.git",
           "http_config": "https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/pipelines/rules_rust-postsubmit.json"
       },
+      "rules_sass": {
+          "git_repository": "https://github.com/bazelbuild/rules_sass.git",
+          "http_config": "https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/pipelines/rules_sass-postsubmit.json"
+      },
       "rules_scala": {
           "git_repository": "https://github.com/bazelbuild/rules_scala.git",
           "http_config": "https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/pipelines/rules_scala-postsubmit.json"
diff --git a/buildkite/pipelines/rules_sass-postsubmit.json b/buildkite/pipelines/rules_sass-postsubmit.json
new file mode 100644
index 0000000..e927657
--- /dev/null
+++ b/buildkite/pipelines/rules_sass-postsubmit.json
@@ -0,0 +1,8 @@
+{
+  "platforms": {
+    "ubuntu1404": {"build_targets": ["..."], "test_targets": ["..."]},
+    "ubuntu1604": {"build_targets": ["..."], "test_targets": ["..."]},
+    "macos": {"build_targets": ["..."], "test_targets": ["..."]}
+  }
+}
+