restore composer.json, add mysqli extension

resources/sass/components/_preloader.scss

@@ -0,0 +1,33 @@
+.pace {
+  -webkit-pointer-events: none;
+  pointer-events: none;
+
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  user-select: none;
+
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  z-index: 99999999;
+
+  transform: translate3d(0, -50px, 0);
+  transition: transform 0.5s ease-out;
+}
+
+.pace.pace-active {
+  transform: translate3d(0, 0, 0);
+}
+
+.pace .pace-progress {
+  display: block;
+  position: fixed;
+  z-index: 2000;
+  top: 0;
+  right: 100%;
+  width: 100%;
+  height: 2px;
+  background: $my-orange;
+  pointer-events: none;
+}