config: expose GeoLite2 data via env vars

Adds GeoLite2 databases and configures nginx to expose the data via GEOIP2_ namespaced environment variables.

conf/nginx.conf

@@ -33,6 +33,38 @@ http {
     server_tokens off;
     #gzip  on;
 
+    geoip2 /etc/nginx/GeoLite2-Country.mmdb {
+        auto_reload 1h;
+
+        $geoip2_metadata_country_build metadata build_epoch;
+
+        # populate the country
+        $geoip2_data_country_code source=$remote_addr country iso_code;
+        $geoip2_data_country_name source=$remote_addr country names en;
+
+        # populate the continent
+        $geoip2_data_continent_code source=$remote_addr continent code;
+        $geoip2_data_continent_name source=$remote_addr continent names en;
+    }
+
+    geoip2 /etc/nginx/GeoLite2-City.mmdb {
+        auto_reload 1h;
+
+        # City name itself
+        $geoip2_data_city_name source=$remote_addr city names en;
+
+        # Postal code will be an approximation, probably the first one in the list that covers an area
+        $geoip2_data_postal_code source=$remote_addr postal code;
+
+        # State in code and long form
+        $geoip2_data_state_code source=$remote_addr subdivisions 0 iso_code;
+        $geoip2_data_state_name source=$remote_addr subdivisions 0 names en;
+
+        # Lat and Lng
+        $geoip2_data_latitude source=$remote_addr location latitude;
+        $geoip2_data_longitude source=$remote_addr location longitude;
+    }
+
     include /etc/nginx/sites-enabled/*;
 }
 #daemon off;