Add configuration settings for Caddy

Author: OmgImAlexis

docs/en/essentials/history-mode.md

@@ -45,7 +45,7 @@ location / {
 For Node.js/Express, consider using [connect-history-api-fallback middleware](https://github.com/bripkens/connect-history-api-fallback).
 
 #### Internet Information Services (IIS)
-```
+```xml
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
   <system.webServer>
@@ -72,6 +72,14 @@ For Node.js/Express, consider using [connect-history-api-fallback middleware](ht
 </configuration>
 ```
 
+#### Caddy
+```
+rewrite {
+    regexp .*
+    to {path} /
+}
+```
+
 ## Caveat
 
 There is a caveat to this: Your server will no longer report 404 errors as all not-found paths now serve up your `index.html` file. To get around the issue, you should implement a catch-all route within your Vue app to show a 404 page: