feat: update login bg

Author: andre-code

renku_theme/login/resources/css/login.css

@@ -28,15 +28,19 @@
 .login-pf body {
   background-color: #07182b;
   height: 100vh;
-  background-image: url("../img/background.svg");
-  background-size: cover;
-  background-repeat: no-repeat;
 
   color: #fff;
   font-family: var(--inter-font);
   font-size: 16px;
   text-shadow: none;
 }
+@media only screen and (min-width: 768px) {
+  .login-pf body {
+    background-image: url("../img/dots_background.svg");
+    background-repeat: repeat-x;
+    background-position: bottom;
+  }
+}
 
 h1 {
   font-size: 24px;