chore: add headers for sfc playground

diff --git a/packages/sfc-playground/public/_headers b/packages/sfc-playground/public/_headers
new file mode 100644 (file)
index 0000000..d56075a
--- /dev/null
+++ b/packages/sfc-playground/public/_headers
@@ -0,0 +1,6 @@
+/*
+  X-Frame-Options: DENY
+
+/assets/*
+  cache-control: max-age=31536000
+  cache-control: immutable