BAEL-20869 Move remaining spring boot modules

spring-boot-modules/spring-boot/src/main/java/com/baeldung/toggle/SalaryController.java

@@ -0,0 +1,20 @@
+package com.baeldung.toggle;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+public class SalaryController {
+
+    @Autowired
+    SalaryService salaryService;
+
+    @PostMapping(value = "/increaseSalary")
+    @ResponseBody
+    public void increaseSalary(@RequestParam long id) {
+        salaryService.increaseSalary(id);
+    }
+}