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/micromark-core-commonmark/dev/lib/line-ending.js

@@ -0,0 +1,34 @@
+/**
+ * @import {
+ *   Construct,
+ *   State,
+ *   TokenizeContext,
+ *   Tokenizer
+ * } from 'micromark-util-types'
+ */
+
+import {ok as assert} from 'devlop'
+import {factorySpace} from 'micromark-factory-space'
+import {markdownLineEnding} from 'micromark-util-character'
+import {types} from 'micromark-util-symbol'
+
+/** @type {Construct} */
+export const lineEnding = {name: 'lineEnding', tokenize: tokenizeLineEnding}
+
+/**
+ * @this {TokenizeContext}
+ *   Context.
+ * @type {Tokenizer}
+ */
+function tokenizeLineEnding(effects, ok) {
+  return start
+
+  /** @type {State} */
+  function start(code) {
+    assert(markdownLineEnding(code), 'expected eol')
+    effects.enter(types.lineEnding)
+    effects.consume(code)
+    effects.exit(types.lineEnding)
+    return factorySpace(effects, ok, types.linePrefix)
+  }
+}