docs: add readme

License: MIT
Signed-off-by: Henrique Dias <hacdias@gmail.com>

README.md

@@ -0,0 +1,45 @@
+# Caddy redirects for Hugo
+
+Generate a redirects file compatible with the [`http.redir`](https://caddyserver.com/v1/docs/redir) plugin from Caddy.
+
+## Usage
+
+Add the module import to your Hugo config file:
+
+```yaml
+module:
+  imports:
+    # other imports
+    - path: github.com/hacdias/hugo-caddy-redirs
+```
+
+Then enable the output file for home:
+
+```yaml
+# Optional: disable the generation of HTML aliases.
+disableAliases: true
+
+# Mandatory
+outputs:
+  home:
+    - html # Default
+    - rss # Default
+    - redir
+```
+
+This will create a `redirects.txt` file on the root of your website. Now you can
+add a rule to your Caddy configuration to use this file as the 301 redirects:
+
+```
+redir 301 {
+  import /the/public/path/redirects.txt
+}
+```
+
+## Thanks
+
+Thanks to @jlelse for the improvement on adding the version with and without the trailing slash. 
+
+## License
+
+MIT