fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/csso/cjs/replace/property/border.cjs

@@ -0,0 +1,20 @@
+'use strict';
+
+function compressBorder(node) {
+    node.children.forEach((node, item, list) => {
+        if (node.type === 'Identifier' && node.name.toLowerCase() === 'none') {
+            if (list.head === list.tail) {
+                // replace `none` for zero when `none` is a single term
+                item.data = {
+                    type: 'Number',
+                    loc: node.loc,
+                    value: '0'
+                };
+            } else {
+                list.remove(item);
+            }
+        }
+    });
+}
+
+module.exports = compressBorder;