Update README.md instructions - missing config

The example dbip.conf configuration should include: Setting lan-IPs and loading ISO country codes to avoid [emerg] errors

Signed-off-by: pgherkin <[email protected]>

Author: pgherkin

README.md

@@ -18,6 +18,11 @@ Follow these steps to enable the dbip mod:
 4. Edit `/config/nginx/dbip.conf` and add countries to the blocklist / whitelist according to the comments, for example:
 
     ```nginx
+    geoip2 /config/geoip2db/dbip-country-lite.mmdb {
+        auto_reload 1w;
+           $geoip2_data_country_iso_code country iso_code;
+    }
+    
     map $geoip2_data_country_iso_code $geo-whitelist {
         default no;
         UK yes;
@@ -27,6 +32,12 @@ Follow these steps to enable the dbip mod:
         default yes;
         US no;
     }
+    
+    geo $lan-ip {
+        default no;
+        192.168.0.0/24 yes;
+        172.20.0.0/16 yes;
+    }
     ```
 5. Use the definitions in the following way:
    ```nginx