動的なドメイン対応

src/config.ts

@@ -9,4 +9,5 @@ function getEnv() {
 export const APP_ENV: "local" | "staging" | "production" | "other" = getEnv();
 // API
 // ----------------------------------------------------------------------
-export const HOST_API = process.env.REACT_APP_HOST_API_KEY || "";
+export const HOST_API =
+  process.env.REACT_APP_HOST_API_KEY || window.location.origin || "";