What do you want us to do? We don’t know anything other then you stated, so unless someone here as a magic wand, there is nothing we can do for you unless you provide way more information then “it does not work”.    what does not work? What is the error? Where is the error? What have you done to try to fix the error?

J'ai hébergé mon site internet. Ça marche sur mon téléphone mais quand je donne le lien aux amis, ça ne fonctionne pas    TRANSLATION: (Please use English here.)   I hosted my website. It works on my phone, but when I give the link to my friends, it doesn't work.

The issue was as BastelPichi mentioned; since I was connecting from Turkey, HTTP requests were being blocked. The problem was resolved when I installed a certificate on the site. Thanks.

The IP is from a turkish provider. This is probably either some issue with your ISP, or more likely some 3rd party script you have in your site (e.g. ad network).

Not bad! However I would right recommend a landing page instead of just a signup form, it helps people understand what you are offering, and helps search engines (hopefully) rank you higher for your keywords