/etc/nginx/sites-enabled/redmine

nginx.conf

# Redmine

upstream redmine {
  server 127.0.0.1:8080 fail_timeout=0;
}

## Normal HTTP host
server {
  listen 0.0.0.0:80;
  listen [::]:80 default_server;
  server_name _;
  server_tokens off;

  ## Redirects all traffic to the HTTPS host
  return 301 https://$host:443$request_uri;
}

## HTTPS host
server {
  listen 0.0.0.0:443 ssl http2;
  listen [::]:443 ssl http2 default_server;
  server_tokens off;
  root /home/redmine/redmine/public;

  ## Increase this if you want to upload large attachments
  client_max_body_size 50m;

  ## Strong SSL Security
  ## https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
  ssl on;
  ssl_certificate /home/redmine/data/certs/redmine.crt;
  ssl_certificate_key /home/redmine/data/certs/redmine.key;
  ssl_verify_client off;

  ssl_ciphers 'AES256+EECDH:AES256+EDH';

  ssl_protocols  TLSv1 TLSv1.1 TLSv1.2;
  ssl_session_cache  builtin:1000  shared:SSL:10m;

  ssl_prefer_server_ciphers   on;

  add_header Strict-Transport-Security "max-age=31536000;";
  # add_header X-Frame-Options SAMEORIGIN;
  add_header X-Content-Type-Options nosniff;

  ## [Optional] If your certficate has OCSP, enable OCSP stapling to reduce the overhead and latency of running SSL.
  ## Replace with your ssl_trusted_certificate. For more info see:
  ## - https://medium.com/devops-programming/4445f4862461
  ## - https://www.ruby-forum.com/topic/4419319
  ## - https://www.digitalocean.com/community/tutorials/how-to-configure-ocsp-stapling-on-apache-and-nginx
  # ssl_stapling on;
  # ssl_stapling_verify on;
  # ssl_trusted_certificate /etc/nginx/ssl/stapling.trusted.crt;
  # resolver 208.67.222.222 208.67.222.220 valid=300s; # Can change to your DNS resolver if desired
  # resolver_timeout 10s;

  ## [Optional] Generate a stronger DHE parameter:
  ##   cd /etc/ssl/certs
  ##   sudo openssl dhparam -out dhparam.pem 4096
  ##

  ## Individual nginx logs for this Redmine vhost
  access_log  /var/log/redmine/nginx/redmine_access.log;
  error_log   /var/log/redmine/nginx/redmine_error.log;

  location / {
    ## Serve static files from defined root folder.
    ## @redmine is a named location for the upstream fallback, see below.
    try_files $uri index.html $uri.html @redmine;
  }

  ## If a file, which is not found in the root folder is requested,
  ## then the proxy passes the request to the upsteam (redmine unicorn).
  location @redmine {
    ## If you use HTTPS make sure you disable gzip compression
    ## to be safe against BREACH attack.
    gzip off;

    ## Some requests take more than 30 seconds.
    proxy_read_timeout      300;
    proxy_connect_timeout   300;
    proxy_redirect          off;
    ## Long issue filters require increasing proxy buffers
    proxy_buffers 8 8k;
    proxy_buffer_size 32k;
    proxy_busy_buffers_size 32k;

    proxy_set_header    Host                $http_host;
    proxy_set_header    X-Real-IP           $remote_addr;
    proxy_set_header    X-Forwarded-Ssl     on;
    proxy_set_header    X-Forwarded-For     $proxy_add_x_forwarded_for;
    proxy_set_header    X-Forwarded-Proto   https;
    proxy_set_header    X-Frame-Options     SAMEORIGIN;

    proxy_pass http://redmine;
  }

  error_page 500 /500.html;
}