refactor: Move Astro to root, use PORT env (default 80), allow all hosts

- Move Astro files from dealplustech-astro/ to project root
- Update Dockerfile: PORT environment variable (default 80)
- Add vite.config.ts with allowedHosts: true
- Matches nixpacks behavior for Easypanel deployment
- No hardcoded ports or domains

node_modules/diff/libesm/convert/dmp.js

@@ -0,0 +1,21 @@
+/**
+ * converts a list of change objects to the format returned by Google's [diff-match-patch](https://github.com/google/diff-match-patch) library
+ */
+export function convertChangesToDMP(changes) {
+    const ret = [];
+    let change, operation;
+    for (let i = 0; i < changes.length; i++) {
+        change = changes[i];
+        if (change.added) {
+            operation = 1;
+        }
+        else if (change.removed) {
+            operation = -1;
+        }
+        else {
+            operation = 0;
+        }
+        ret.push([operation, change.value]);
+    }
+    return ret;
+}