Enable support for HTTPs

- **Description:** Create a support for HTTPs.

- **Sub-tasks:**

    - [ ] Find free SSL certificate issuear. Possible option is [Let's Encrypt][https://letsencrypt.org/]
    - [ ] Create SSL certificate
    - [ ] Write a code for changing the configuration to support HTTPs
    - [ ] Write a autmated script/test to check the website supports both HTTP and HTTPs methods symantaniasly.