fix: add missing FAVICON_PATH to docker-compose

docker-compose.yml

@@ -40,6 +40,7 @@ services:
       - MAGIC_IS_AVAILABLE=${MAGIC_IS_AVAILABLE:-True}
       - URL_PREFIX=geocontrib/
       - LOGO_PATH=${LOGO_PATH:-/geocontrib/img/logo-neogeo-circle.png}
+      - FAVICON_PATH=${FAVICON_PATH:-/geocontrib/img/favicon_gc.png}
       - DISPLAY_FORBIDDEN_PROJECTS=${DISPLAY_FORBIDDEN_PROJECTS:-"true"}
       - LOG_URL=${LOG_URL}
       - DISABLE_LOGIN_BUTTON=${DISABLE_LOGIN_BUTTON}