refactor: update site URL to be single source of truth (#143)

* wip: astro config to use .ts instead of .mjs

* fix: remove invalid prop in astro config

* refactor: single source of truth for site url

* refactor: make minor updates due to astro.config.ts

---------

Co-authored-by: satnaing <satnaingdev@gmail.com>

astro.config.ts

@@ -0,0 +1,40 @@
+import { defineConfig } from "astro/config";
+import tailwind from "@astrojs/tailwind";
+import react from "@astrojs/react";
+import remarkToc from "remark-toc";
+import remarkCollapse from "remark-collapse";
+import sitemap from "@astrojs/sitemap";
+import { SITE } from "./src/config";
+
+// https://astro.build/config
+export default defineConfig({
+  site: SITE.website,
+  integrations: [
+    tailwind({
+      applyBaseStyles: false,
+    }),
+    react(),
+    sitemap(),
+  ],
+  markdown: {
+    remarkPlugins: [
+      remarkToc,
+      [
+        remarkCollapse,
+        {
+          test: "Table of contents",
+        },
+      ],
+    ],
+    shikiConfig: {
+      theme: "one-dark-pro",
+      wrap: true,
+    },
+  },
+  vite: {
+    optimizeDeps: {
+      exclude: ["@resvg/resvg-js"],
+    },
+  },
+  scopedStyleStrategy: "where",
+});