Having troubles finishing setup

Hello, I completed terminal side installation by following official document instructions and everything seems right and correct but I am not able to open https://mitybosklubas.lt/ghost/ to complete installation.

I am going to attach all technical information below:

Ubnutu version: VERSION_ID=“20.04”
mysql Ver 8.0.23-0ubuntu0.20.04.1 for Linux on x86_64 ((Ubuntu))
nginx version: nginx/1.18.0 (Ubuntu)
node --version; v14.16.1
Ghost-CLI version: 1.16.3
My server ip:
/var/www/mitybosklubas.lt permisions 775

I skipped ssl installation because I am not sure about it and during the installation I was told that It can be done later by running certain command.

I am relatively new with all of this and really have no clue why I am not able to finish this setup. Maybe someone would know what could be done to fix this and could help me? :slight_smile: thanks