Bump ecstatic and http-server in /elm-pages

Removes [ecstatic](https://github.com/jfhbrook/node-ecstatic). It's no longer used after updating ancestor dependency [http-server](https://github.com/http-party/http-server). These dependencies need to be updated together.


Removes `ecstatic`

Updates `http-server` from 0.12.3 to 14.1.1
- [Release notes](https://github.com/http-party/http-server/releases)
- [Commits](http-party/http-server@v0.12.3...v14.1.1)

---
updated-dependencies:
- dependency-name: ecstatic
  dependency-type: indirect
- dependency-name: http-server
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>