Slight rework so that config can have a base dir but the program can start in another one.

config.cpp

@@ -5,8 +5,10 @@
 using nlohmann::json;
 using fmt::format;
 
+std::filesystem::path Config::BASE_DIR{"."};
+
 Config::Config(const std::string src_path) : $src_path(src_path) {
-  std::ifstream infile($src_path);
+  std::ifstream infile(Config::path_to($src_path));
   $config = json::parse(infile);
 }
 
@@ -33,3 +35,11 @@ std::vector<std::string> Config::keys() {
 
   return the_fucking_keys;
 }
+
+void Config::set_base_dir(const char *optarg) {
+  Config::BASE_DIR.assign(optarg);
+}
+
+std::filesystem::path Config::path_to(const std::string& path) {
+  return Config::BASE_DIR / path;
+}