matrixsynapse/nginx_matrix.conf

server {
    listen 8000;
    listen [::]:8000;

    server_name _;

    # required, else the limit is 1mb
    client_max_body_size 200M;

    location / {
        proxy_pass http://localhost:8008;
        proxy_set_header X-Forwarded-For $remote_addr;
    }

    location /.well-known/matrix/server {
        return 200 '{"m.server": "$host:443"}';
        add_header Content-Type application/json;
    }

}