add mojang api status endpoint

src/main/java/cc/fascinated/exception/impl/InternalServerErrorException.java

@@ -0,0 +1,12 @@
+package cc.fascinated.exception.impl;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
+public class InternalServerErrorException extends RuntimeException {
+
+    public InternalServerErrorException(String message) {
+        super(message);
+    }
+}