Add background color on photos parent element

So we see a color instead of a transparent block while loading the image

src/style/organisms/_house.scss

@@ -45,6 +45,7 @@
             position: relative;
             z-index: 3;
             overflow: hidden;
+            background: $color-primary-tertiary20;
 
             @include bp (sm) {
                 border-radius: 8px;

src/style/pages/_homepage.scss

@@ -71,6 +71,7 @@
             margin-left: auto;
             margin-right: auto;
             transform: rotate(var(--rotation)) translateZ(0);
+            background: $color-primary-tertiary20;
 
             // First row
             &:nth-child(1) {