redirect on root call

Signed-off-by: Peter Siegmund <developer@mars3142.org>

src/main/java/dev/mars3142/fhq/timezone_service/root/controller/web/RootController.java

@@ -0,0 +1,21 @@
+package dev.mars3142.fhq.timezone_service.root.controller.web;
+
+import java.net.URI;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/")
+public class RootController {
+
+  @GetMapping
+  public ResponseEntity<Void> getRoot() {
+    return ResponseEntity.status(HttpStatus.SEE_OTHER)
+        .location(URI.create("https://firmware-hq.dev"))
+        .build();
+  }
+
+}