Fixes #131 - Add API version check (#132)

webapp/src/main/java/com/manorrock/toyger/webapp/ApiVersionCheckResource.java

@@ -0,0 +1,29 @@
+package com.manorrock.toyger.webapp;
+
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.core.Response;
+
+/**
+ * The API version checkout.
+ *
+ * @see https://distribution.github.io/distribution/spec/api/#api-version-check
+ * @author MAnfred Riem ([email protected])
+ */
+@Path("v2")
+public class ApiVersionCheckResource {
+
+    /**
+     * Return status 200 with header 
+     * 'Docker-Distribution-API-Version: registry/2.0'.
+     *
+     * @return the response.
+     */
+    @GET
+    public Response apiVersionCheck() {
+        return Response
+                .ok()
+                .header("Docker-Distribution-API-Version", "registry/2.0")
+                .build();
+    }
+}

webapp/src/main/java/com/manorrock/toyger/webapp/JakartaRestConfiguration.java

@@ -7,7 +7,7 @@
  * Configures Jakarta RESTful Web Services for the application.
  * @author Juneau
  */
-@ApplicationPath("resources")
+@ApplicationPath("")
 public class JakartaRestConfiguration extends Application {
 
 }