docs: bash (#1404)

docs/how-to.md

@@ -157,6 +157,21 @@ In order to run scripts that require the use of a scripting language, use the fo
    // ...
    ```
 
+## Bash
+
+Hook scripts need to be POSIX compliant to ensure best compatibility as not everyone has `bash` (e.g. Windows users).
+
+That being said, if your team doesn't use Windows, you can use Bash this way:
+
+```shell
+# .husky/pre-commit
+
+bash << EOF
+# Put your bash script inside
+# ...
+EOF
+```
+
 ## Node Version Managers and GUIs
 
 If you're using Git hooks in GUIs with Node installed via a version manager (like `nvm`, `n`, `fnm`, `asdf`, `volta`, etc...), you might face a `command not found` error due to `PATH` environment variable issues.