Add download step to docker build

Dockerfile

@@ -40,7 +40,8 @@ COPY lib ./lib
 
 RUN npm run deploy --prefix ./assets && \
     npm run deploy --prefix ./tracker && \
-    mix phx.digest priv/static
+    mix phx.digest priv/static && \
+    mix download_country_database
 
 WORKDIR /app
 COPY rel rel

config/runtime.exs

@@ -66,7 +66,13 @@ cron_enabled = String.to_existing_atom(System.get_env("CRON_ENABLED", "false"))
 custom_domain_server_ip = System.get_env("CUSTOM_DOMAIN_SERVER_IP")
 custom_domain_server_user = System.get_env("CUSTOM_DOMAIN_SERVER_USER")
 custom_domain_server_password = System.get_env("CUSTOM_DOMAIN_SERVER_PASSWORD")
-geolite2_country_db = System.get_env("EOLITE2_COUNTRY_DB", "priv/geodb/dbip-country.mmdb")
+
+geolite2_country_db =
+  System.get_env(
+    "GEOLITE2_COUNTRY_DB",
+    Application.app_dir(:plausible) <> "/priv/geodb/dbip-country.mmdb"
+  )
+
 disable_auth = String.to_existing_atom(System.get_env("DISABLE_AUTH", "false"))
 disable_registration = String.to_existing_atom(System.get_env("DISABLE_REGISTRATION", "false"))
 hcaptcha_sitekey = System.get_env("HCAPTCHA_SITEKEY")