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/astro/components/image.css

@@ -0,0 +1,11 @@
+:where([data-astro-image]) {
+	object-fit: var(--fit);
+	object-position: var(--pos);
+	height: auto;
+}
+:where([data-astro-image="full-width"]) {
+	width: 100%;
+}
+:where([data-astro-image="constrained"]) {
+	max-width: 100%;
+}