Switching NGINX from Stable Branch to Mainline

1. Run sudo apt remove nginx to remove the current installation of NGINX while preserving the configuration files.

2. Run sudo apt install curl gnupg2 ca-certificates lsb-release to install the prerequisites.

3. Run the following to set up the repository for mainline packages:

   echo "deb http://nginx.org/packages/mainline/ubuntu `lsb_release -cs` nginx" | sudo tee /etc/apt/sources.list.d/nginx.list

4. Run curl -fsSL https://nginx.org/keys/nginx_signing.key | sudo apt-key add - to import an official NGINX signing key so apt can verify the package's authenticity.

5. Run sudo apt-key fingerprint ABF5BD827BD9BF62 to verify you have the proper key.

6. The output should contain the full fingerprint 573B FD6B 3D8F BC64 1079 A6AB ABF5 BD82 7BD9 BF62.

7. Run sudo apt update and sudo apt install nginx.

8. Run sudo rm /etc/nginx/conf.d/default.conf to remove the default configuration.

9. Run sudo vim /etc/nginx/nginx.conf and add include /etc/nginx/sites-enabled/*; below the line include /etc/nginx/conf.d/*.conf;.

10. Run sudo nginx -s reload.

11. Run sudo service nginx stop.

12. Run sudo service nginx start.

13. Run netstat -tln to check the server is listening on port 443 rather than 80.

14. Check the PhixFlow application loads in the browser. Check the security settings in the browser console.

15. Run nginx -V to check the version.

Installing NGINX Mainline Directly

1. Run sudo apt install curl gnupg2 ca-certificates lsb-release to install the prerequisites.

2. Run the following to set up the repository for mainline packages:

   echo "deb http://nginx.org/packages/mainline/ubuntu `lsb_release -cs` nginx" | sudo tee /etc/apt/sources.list.d/nginx.list

3. Run curl -fsSL https://nginx.org/keys/nginx_signing.key | sudo apt-key add - to import an official NGINX signing key so apt can verify the package's authenticity.

4. Run sudo apt-key fingerprint ABF5BD827BD9BF62 to verify you have the proper key.

5. The output should contain the full fingerprint 573B FD6B 3D8F BC64 1079 A6AB ABF5 BD82 7BD9 BF62.

6. Run sudo apt update and sudo apt install nginx.

7. Run sudo rm /etc/nginx/conf.d/default.conf to remove the default configuration.

8. Run sudo vim /etc/nginx/conf.d/phixflow.conf and paste in the following, replacing [subdomain] with the appropriate subdomain of the server:

   server {
       listen 443 ssl;
       listen [::]:443 ssl ipv6only=on;
   
       server_name [subdomain].phixflow.com;
   
       location / {
           proxy_pass http://127.0.0.1:8080;
       }
   
       ssl_certificate /etc/letsencrypt/live/[subdomain].phixflow.com/fullchain.pem;
       ssl_certificate_key /etc/letsencrypt/live/[subdomain].phixflow.com/privkey.pem;
       include /etc/letsencrypt/options-ssl-nginx.conf;
       ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
       client_max_body_size 40M;
       add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload";
   }

9. Run sudo nginx -s reload.

10. Run sudo service nginx stop.

11. Run sudo service nginx start.

12. Run netstat -tln to check the server is listening on port 443 rather than 80.

13. Check the PhixFlow application loads in the browser. Check the security settings in the browser console.

14. Run nginx -V to check the version.