What I would recommend doing, just to make sure we get the correct setup, is running

 ufw disable 

Then

 ufw reset 

Then

 ufw reset 

The above stops ufw and then resets all rules. With a clean slate, we setup our default policies first.

 
ufw default deny incoming \
&& ufw default allow outgoing 

With those rules in place, we then add the rules we need to work for whatever our purposes are. To start, I recommend allowing SSH in first.

 
ufw allow 22/tcp

We can then allow application-specific ports, such as 80, 443, 8001, etc. I’ll start with those three.

 
ufw allow 80/tcp \
&& ufw allow 443/tcp \
&& ufw allow 8001/tcp

Then

 ufw enable