Add a config file

.gitignore

@@ -21,3 +21,5 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+config.js

src/sample.config.js

@@ -0,0 +1,4 @@
+const config = {
+	thumbnailServer: "http://localhost:8000"
+};
+export default config;