Initialise Spring API with ShortLink endpoints

backend/src/main/java/services/shay/Halflink.java

@@ -0,0 +1,21 @@
+package services.shay;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@SpringBootApplication
+public class Halflink {
+
+    @GetMapping("/")
+    String home() {
+        return "Halflink API says hello!";
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(Halflink.class, args);
+    }
+
+}