Maxmind Docker mod for Nginx based images

This mod adds the maxmind database to nginx using the license key defined in the environment variable.

This mod downloads the GeoLite2-City.mmdb database under /config/geoip2db, the database is updated weekly.

This mod should not be enabled together with the swag-dbip mod.

Follow these steps to enable the maxmind mod:

1. Acquire a maxmind license here: https://www.maxmind.com/en/geolite2/signup

2. In the container's docker arguments, set an environment variable DOCKER_MODS=linuxserver/mods:swag-maxmind

   If adding multiple mods, enter them in an array separated by |, such as DOCKER_MODS=linuxserver/mods:swag-maxmind|linuxserver/mods:swag-mod2

3. In the container's docker arguments, set an environment variable MAXMINDDB_LICENSE_KEY=<license-key> with your license key.

4. Recreate the container to apply the changes.

5. Add the following line to /config/nginx/nginx.conf under the http section:

   include /config/nginx/maxmind.conf;
   

6. Edit /config/nginx/maxmind.conf and add countries to the blocklist / whitelist according to the comments, for example:

   map $geoip2_data_country_iso_code $geo-whitelist {
       default no;
       GB yes;
   }
   
   map $geoip2_data_country_iso_code $geo-blacklist {
       default yes;
       US no;
   }
   

7. Use the definitions in the following way:

    server {
        listen 443 ssl;
        listen [::]:443 ssl;
   
        server_name some-app.*;
        include /config/nginx/ssl.conf;
        client_max_body_size 0;
   
        if ($lan-ip = yes) { set $geo-whitelist yes; }
        if ($geo-whitelist = no) { return 404; }
   
        location / {
   

8. Restart the container to apply the changes.