nginx.conf

limit_req_zone $binary_remote_addr zone={{ domain }}_ratelimit:10m rate=1r/s;
proxy_cache_path /var/cache/lemmy/{{domain}}/ levels=1:2 keys_zone=lemmy_cache_{{domain|replace(".","_")|replace("-","_")}}:10m max_size=100m use_temp_path=off;
proxy_cache_key $scheme$proxy_host$request_uri$http_accept;

server {
    listen 80;
    listen [::]:80;
    server_name {{ domain }};
    # Hide nginx version
    server_tokens off;
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }
    location / {
        return 301 https://$host$request_uri;
    }
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name {{ domain }};

    ssl_certificate /etc/letsencrypt/live/{{ domain }}/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/{{ domain }}/privkey.pem;


    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';
    ssl_session_timeout  10m;
    ssl_session_cache shared:SSL:10m;
    ssl_session_tickets on;
    ssl_stapling on;
    ssl_stapling_verify on;

    # Hide nginx version
    server_tokens off;

    # Upload limit, relevant for pictrs
    client_max_body_size 20M;

    # Enable compression for JS/CSS/HTML bundle, for improved client load times.
    # It might be nice to compress JSON, but leaving that out to protect against potential
    # compression+encryption information leak attacks like BREACH.
    gzip on;
    gzip_types text/css application/javascript image/svg+xml;
    gzip_vary on;

    # Various content security headers
    add_header Referrer-Policy "same-origin";
    add_header X-Content-Type-Options "nosniff";
    add_header X-Frame-Options "DENY";
    add_header X-XSS-Protection "1; mode=block";


    location / {
      proxy_pass http://0.0.0.0:{{lemmy_port}};
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

      proxy_cache lemmy_cache_{{domain|replace(".","_")|replace("-","_")}};
      proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
      proxy_no_cache $cookie_jwt $http_authorization;
      proxy_cache_bypass $cookie_jwt $http_authorization;
      # for debugging, should probably be disabled in prod
      #add_header x-cache-status $upstream_cache_status;
    }
}

access_log /var/log/nginx/access.log combined;