fix bug in checkhttp.go

Signed-off-by: Christian Richter <crichter@owncloud.com>

ocis-pkg/handlers/checkhttp.go

@@ -13,10 +13,11 @@ func NewHTTPCheck(url string) func(context.Context) error {
 		c := http.Client{
 			Timeout: 3 * time.Second,
 		}
-		_, err := c.Get(url)
+		resp, err := c.Get(url)
 		if err != nil {
 			return fmt.Errorf("could not connect to http server: %v", err)
 		}
+		_ = resp.Body.Close()
 		return nil
 	}
 }