add: file handling with 404

include/config.h

@@ -30,6 +30,10 @@ typedef struct
     run_type_t run_type;
     char server_port[6];
     uint16_t discovery_port;
+    char *not_found_file;
+    char *not_found_file_type;
+    char *not_found_content;
+    char *not_found_content_type;
     struct mg_serve_http_opts http_server_opts;
 } config_t;
 

include/router.h

@@ -15,6 +15,9 @@ typedef enum
     HTTP_METHOD_OPTIONS = (1 << 4)
 } http_method_e;
 
+endpoint_t*
+router_get_not_found_endpoint();
+
 void
 router_init();