Ставим nginx и php нужных версий.

И делаем конфиг для виртуального хоста в nginx

server {

listen 127.0.0.1:8895 default_server;

server_name www.site.ru;


access_log /var/log/nginx/rtc.log;

add_header "X-Content-Type-Options" "nosniff";


location /bitrix/pub/ {

        # IM doesn't wait

        proxy_ignore_client_abort on;

        proxy_pass http://nodejs_pub;

    }

    location / {

        deny all;

    }

}

# Push/sub server

upstream nodejs_sub {

  ip_hash;

  keepalive 1024;

  server 127.0.0.1:8010;

  server 127.0.0.1:8011;

  server 127.0.0.1:8012;

  server 127.0.0.1:8013;

  server 127.0.0.1:8014;

  server 127.0.0.1:8015;

}


# Push/pub server

upstream nodejs_pub {

  ip_hash;

  keepalive 1024;

  server 127.0.0.1:9010;

  server 127.0.0.1:9011;

}


# if connection ti not set

map $http_upgrade $connection_upgrade {

  default upgrade;

  '' 'close';

}


map $http_upgrade  $replace_upgrade {

  default $http_upgrade;

  ''      "websocket";

}


server {

    listen                  80;

    server_name             www.site.ru;


    location / {

        return 301 https://$server_name$request_uri;

    }

}


server {

    listen 443 ssl;

    ssl_certificate /etc/nginx/ssl/crt.ru.crt;

    ssl_certificate_key /etc/nginx/ssl/key.ru_private.key;

    server_name  www.site.ru;

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

    error_log   /var/log/nginx/error.log;

    gzip on;

    gzip_comp_level 7;

    gzip_types                      application/x-javascript application/javascript text/css;

    charset off;

    #disable_symlinks if_not_owner from=$root_path;

    index index.php;

    root $root_path;

    set $root_path /home/bitrix/www;

    set $php_sock unix:/run/php/php7.4-fpm-bitrix.sock;

    proxy_set_header X-Real-IP $remote_addr;

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_set_header Host $host;

    client_max_body_size 1024M;

    client_body_buffer_size 4M;

    location / {

            try_files       $uri $uri/ @bitrix;

        }

location ~* ^/bitrix/subws/ {

     access_log /var/log/nginx/im_access.log  json;

     error_log /var/log/nginx/im_error.log warn;

    proxy_pass http://nodejs_sub;

    # http://blog.martinfjordvald.com/2013/02/websockets-in-nginx/
    # 12h+0.5
    proxy_max_temp_file_size 0;

    proxy_read_timeout  43800;

    proxy_http_version 1.1;

    proxy_set_header Upgrade $replace_upgrade;

    proxy_set_header Connection $connection_upgrade;

}

location ~* ^/bitrix/sub/ {

     access_log /var/log/nginx/im_access.log  json;

     error_log /var/log/nginx/im_error.log warn;

    rewrite ^/bitrix/sub/(.*)$ /bitrix/subws/$1 break;

    proxy_pass http://nodejs_sub;

    proxy_max_temp_file_size 0;

    proxy_read_timeout  43800;

}

location ~* ^/bitrix/rest/ {

     access_log /var/log/nginx/im_access.log  json;

     error_log /var/log/nginx/im_error.log warn;

    proxy_pass http://nodejs_pub;

    proxy_max_temp_file_size 0;

    proxy_read_timeout  43800;

}


location ~* /upload/.*\.(php|php3|php4|php5|php6|phtml|pl|asp|aspx|cgi|dll|exe|shtm|shtml|fcg|fcgi|fpl|asmx|pht|py|psp|rb|var)$ {

        types {

                text/plain text/plain php php3 php4 php5 php6 phtml pl asp aspx cgi dll exe ico shtm shtml fcg fcgi fpl asmx pht py psp rb var;

        }

}

location ~ \.php$ {

        try_files       $uri @bitrix;

        fastcgi_pass    $php_sock;

        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

        fastcgi_param PHP_ADMIN_VALUE "sendmail_path = /usr/sbin/sendmail -t -i -f wm@test.ru";

        include fastcgi_params;

}

location @bitrix {

        fastcgi_pass    $php_sock;

        include fastcgi_params;

        fastcgi_param SCRIPT_FILENAME $document_root/bitrix/urlrewrite.php;

        fastcgi_param PHP_ADMIN_VALUE "sendmail_path = /usr/sbin/sendmail -t -i -f wm@test.ru";

}
location ~* /bitrix/admin.+\.php$ {

        try_files       $uri @bitrixadm;

        fastcgi_pass    $php_sock;

        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

        fastcgi_param PHP_ADMIN_VALUE "sendmail_path = /usr/sbin/sendmail -t -i -f wm@test.ru";

        include fastcgi_params;

}

location @bitrixadm{

        fastcgi_pass    $php_sock;

        include fastcgi_params;

        fastcgi_param SCRIPT_FILENAME $document_root/bitrix/admin/404.php;

        fastcgi_param PHP_ADMIN_VALUE "sendmail_path = /usr/sbin/sendmail -t -i -f wm@test.ru";

}

location = /favicon.ico {

        log_not_found off;

        access_log off;

}

location = /robots.txt {

        allow all;

        log_not_found off;

        access_log off;

}

#
# block this locations for any installation
#

# ht(passwd|access)

location ~* /\.ht  { deny all; }

# repositories

location ~* /\.(svn|hg|git) { deny all; }

# bitrix internal locations

location ~* ^/bitrix/(modules|local_cache|stack_cache|managed_cache|php_interface) {

        deny all;

}

# upload files

location ~* ^/upload/1c_[^/]+/ { deny all; }

# use the file system to access files outside the site (cache)

location ~* /\.\./ { deny all; }

location ~* ^/bitrix/html_pages/\.config\.php { deny all; }

location ~* ^/bitrix/html_pages/\.enabled { deny all; }

# Intenal locations

location ^~ /upload/support/not_image   { internal; }

# Cache location: composite and general site

location ~* @.*\.html$ {

        internal;

        # disable browser cache, php manage file

        expires -1y;

        add_header X-Bitrix-Composite "Nginx (file)";

}

# Player options, disable no-sniff

location ~* ^/bitrix/components/bitrix/player/mediaplayer/player$ {

        add_header Access-Control-Allow-Origin *;

}

# Accept access for merged css and js

location ~* ^/bitrix/cache/(css/.+\.css|js/.+\.js)$ {

        expires 30d;

        error_page 404 /404.html;

}

# Disable access for other assets in cache location

location ~* ^/bitrix/cache              { deny all; }

# Use nginx to return static content from s3 cloud storage

# /upload/bx_cloud_upload/<schema>.<backet_name>.<s3_point>.amazonaws.com/<path/to/file>

location ^~ /upload/bx_cloud_upload/ {

location ~ ^/upload/bx_cloud_upload/(http[s]?)\.([^/:]+)\.(s3|s3-us-west-1|s3-eu-west-1|s3-ap-
southeast-1|s3-ap-northeast-1)\.amazonaws\.com/(.+)$ {

        internal;

        resolver 8.8.8.8;

        proxy_method GET;

        proxy_set_header    X-Real-IP               $remote_addr;

        proxy_set_header    X-Forwarded-For         $proxy_add_x_forwarded_for;

        proxy_set_header    X-Forwarded-Server      $host;

        #proxy_max_temp_file_size 0;

        proxy_pass $1://$2.$3.amazonaws.com/$4;

  }

location ~* .*$       { deny all; }

}

# Static content

location ~* ^/(upload|bitrix/images|bitrix/tmp) {

       expires 30d;
}

location  ~* \.(css|js|gif|png|jpg|jpeg|ico|ogg|ttf|woff|eot|otf)$ {

      error_page 404 /404.html;

      expires 30d;

}

location = /404.html {

        access_log off ;

}

}