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/@shikijs/langs/dist/shellsession.mjs

@@ -0,0 +1,8 @@
+import shellscript from './shellscript.mjs'
+
+const lang = Object.freeze(JSON.parse("{\"displayName\":\"Shell Session\",\"fileTypes\":[\"sh-session\"],\"name\":\"shellsession\",\"patterns\":[{\"captures\":{\"1\":{\"name\":\"entity.other.prompt-prefix.shell-session\"},\"2\":{\"name\":\"punctuation.separator.prompt.shell-session\"},\"3\":{\"name\":\"source.shell\",\"patterns\":[{\"include\":\"source.shell\"}]}},\"match\":\"^(?:((?:\\\\(\\\\S+\\\\)\\\\s*)?(?:sh\\\\S*?|\\\\w+\\\\S+[:@]\\\\S+(?:\\\\s+\\\\S+)?|\\\\[\\\\S+?[:@]\\\\N+?].*?))\\\\s*)?([#$%>❯➜\\\\p{Greek}])\\\\s+(.*)$\"},{\"match\":\"^.+$\",\"name\":\"meta.output.shell-session\"}],\"scopeName\":\"text.shell-session\",\"embeddedLangs\":[\"shellscript\"],\"aliases\":[\"console\"]}"))
+
+export default [
+...shellscript,
+lang
+]