docs: update readme to include caveat

README.md

@@ -42,6 +42,7 @@ The available toolchain in the image are:
 - cargo-chef
 - cargo-hack
 - release-plz
+- perl
 
 ### Scripts
 
@@ -57,3 +58,13 @@ steps:
   - name: Check for Ignored Files
     run: check-for-ignored
 ```
+
+## Caveats
+
+### native-tls
+
+This crate *must* use the `vendored` feature in order to compile in the Alpine Linux image.
+
+```toml
+native-tls = { version = "0.2", features = ["vendored"] }
+```