added security and fix edit profile

src/main/java/com/krylov/refound/controller/PostController.java

@@ -42,6 +42,11 @@ public class PostController {
     return service.getFeed();
   }
 
+  @GetMapping("/{id}")
+  public List<PostResponse>  getById(@PathVariable Long id) {
+    return service.getById(id);
+  }
+
   @PutMapping(value = "/{id}", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
   public PostResponse update(
       @PathVariable Long id,