Fix default searx authentication setup

roles/searx/README.md

@@ -29,3 +29,21 @@ subdomain_alias: search
 If the deployed container should be served over a uri that is not the stack name. 
 By default, it will be set to `search.yourdomain.com` - 
 if this option is not set it will be served on `searx.yourdomain.com` instead.
+
+```
+searx_authentication:
+    - username: mysearxusername
+      password: <hashed basicauth password>
+```
+
+By default, the searx instance is not protected with a login, however you
+can have caddy provide a basic auth login form by using this variable.
+
+You can either change the login to suit you by generating a combination 
+(or multiple, it will also work with an arbitrary amount of logins),
+or remove the necessity to login altogether by not setting the 
+`searx_authentication` variable to anything.
+
+The password needs to be in a hashed format, which is easiest to accomplish 
+with the help of caddy itself --- simply doing `caddy hash-password` will 
+allow you to create a new hashed password.