fix: response exceptions from sub services (#28)

Co-authored-by: TakahashiNg <83152264+TakahashiNguyen@users.noreply.github.com>
Reviewed-on: #28

gateway-service/src/main/java/com/drinkool/mappers/RestClientExceptionMapper.java

@@ -0,0 +1,21 @@
+package com.drinkool.mappers;
+
+import jakarta.ws.rs.core.Response;
+import jakarta.ws.rs.ext.ExceptionMapper;
+import jakarta.ws.rs.ext.Provider;
+import org.jboss.resteasy.reactive.ClientWebApplicationException;
+
+@Provider
+public class RestClientExceptionMapper
+	implements ExceptionMapper<ClientWebApplicationException>
+{
+
+	@Override
+	public Response toResponse(ClientWebApplicationException exception) {
+		Response originalResponse = exception.getResponse();
+
+		return Response.status(originalResponse.getStatus())
+			.entity(originalResponse.readEntity(String.class))
+			.build();
+	}
+}