Add ApiApplication class to configure Jersey and register Jackson feature

hibernate-project/src/main/java/com/humanbooster/api/ApiApplication.java

@@ -0,0 +1,11 @@
+package com.humanbooster.api;
+
+import org.glassfish.jersey.jackson.JacksonFeature;
+import org.glassfish.jersey.server.ResourceConfig;
+
+public class ApiApplication extends ResourceConfig {
+    public ApiApplication() {
+        packages("com.humanbooster");
+        register(JacksonFeature.class);
+    }
+}