How to send request to Ubuntu Server VM from public network?

[Mkkk]

I have set up a yaml file in folder '/etc/netplan' following the template:
network:
version: 2
ethernets:
eth0:
dhcp4: false
addresses:
- my public ip from 'curl ipinfo.io/ip'
gateway4: my gateway ip from 'ip route | grep default', e.g. it is 192.168.1.1 for log "default via 192.168.1.1 dev eth0"
nameservers:
addresses:
- 8.8.8.8
- 8.8.4.4

Also, I have set my nginx as

server {
listen 80;

server_name my_public_ip;

location / {
proxy_pass http://127.0.0.1:8000;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}

I am sure my FastAPI server (hosted with Gunicorn and Nginx) works when I change the "my_public_ip" to the private IP address ('192.168.50.136') shown in VM summary page of the Proxmox UI.

I am still not able to send request to my running server "my_public_ip_addr:80" ;_;

This is the summary of my Ubuntu 24.04 Server Virtual Machine


The first IP is my public ip from 'curl ipinfo.io/ip'.

Do I need to create another Network -> Linux Bridge? e.g. another CIDR, Gateway etc...

I am new to this, can anyone please help? Thank you!

I didnt setup ufw firwall
sudo ufw status
Status: inactive

 

[Mkkk]

Anyone, please help

 

[Mkkk]

Do I need to go to the router's configuration page to open some ports for port forwarding? Can I do this via the command line since I don't have access to the page at the moment?

Just wanna make sure I am on the right track.