That would only work easily in your own network. As soon as you want access from other networks (mobile/work/etc.) you need to:

• Get a public IPv4 from your provider. I got that easily, but idk if your provider can and will do this. Otherwise, there are proxy services.
• Open port 80 (http) and 443 (https) in your router.
• Very likely buy a domain (which is 1.4€ - 10€ per year, depending on the name and tld).