adding z-index to homepage header content area so the pixel svgs don't overlap

opentech/static_src/src/sass/public/components/_wrapper.scss

@@ -227,6 +227,8 @@
         justify-content: flex-end;
 
         .header--homepage & {
+            position: relative;
+            z-index: 10;
             align-items: flex-start;
             justify-content: center;
             height: 100%;