add server-side code and mobile app code

server/vendor/symfony/http-client/README.md

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+HttpClient component
+====================
+
+The HttpClient component provides powerful methods to fetch HTTP resources synchronously or asynchronously.
+
+Sponsor
+-------
+
+The HttpClient component for Symfony 6.4 is [backed][1] by [Innovative Web AG][2].
+
+Innovative Web AG (i-web) is a specialist for web, applications and the
+digitalisation of the public sector based in Switzerland. With their i-CMS,
+public authorities and institutions implement modern websites and eGovernment
+portals and offer user-friendly eServices for residents and companies.
+
+Help Symfony by [sponsoring][3] its development!
+
+Resources
+---------
+
+ * [Documentation](https://symfony.com/doc/current/components/http_client.html)
+ * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+ * [Report issues](https://github.com/symfony/symfony/issues) and
+   [send Pull Requests](https://github.com/symfony/symfony/pulls)
+   in the [main Symfony repository](https://github.com/symfony/symfony)
+
+[1]: https://symfony.com/backers
+[2]: https://www.i-web.ch
+[3]: https://symfony.com/sponsor