feat(ipinfo): support GeoIP (#26)

Co-authored-by: E99p1ant <[email protected]>

internal/cli/config.tpl.yaml

@@ -1,4 +1,4 @@
-version: 1.2
+version: 1.3
 addr: :10000
 token:
 domain:
@@ -7,6 +7,10 @@ admin_path_prefix: "/revsuit"
 database: revsuit.db
 log_level: info
 
+ip_location_database:
+  database: "qqwry"                 # qqwry or geoip.
+  geo_license_key: ""               # Mandatory field, if you choose to use GeoIP.
+
 http:
   ip_header:
 dns: