Nginx config to run Nextcloud and Collabora on the same virtual host

nginx-vh.conf

upstream php-fpm-handler {
  server ${NEXTCLOUD_FPM_HOST}:${NEXTCLOUD_FPM_PORT};
}

upstream collabora-handler {
  server ${COLLABORA_HOST}:${COLLABORA_PORT};
}

server {
  listen ${NGINX_PORT};
  server_name ${NGINX_HOST};

  root /var/www/html;

  # set max upload size
  client_max_body_size 10G;
  fastcgi_buffers 64 4K;

  # Enable gzip but do not remove ETag headers
  gzip on;
  gzip_vary on;
  gzip_comp_level 4;

  gzip_min_length 256;
  gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
  gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;

  index index.php;
  error_page 403 /core/templates/403.php;
  error_page 404 /core/templates/404.php;

  add_header Strict-Transport-Security max-age=15768000;
  add_header X-Content-Type-Options nosniff;
  add_header X-XSS-Protection "1; mode=block";
  add_header X-Robots-Tag none;
  add_header X-Download-Options noopen;
  add_header X-Permitted-Cross-Domain-Policies none;

  location = /robots.txt {
    allow all;
    log_not_found off;
    access_log off;
  }

  location = /.well-known/carddav {
    return 301 $scheme://$host/remote.php/dav;
  }

  location = /.well-known/caldav {
    return 301 $scheme://$host/remote.php/dav;
  }

  location / {
    rewrite ^ /index.php$uri;
  }

  location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)/ {
    deny all;
  }

  location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console) {
    deny all;
  }

  location ~ ^/(?:index|remote|public|cron|core/ajax/update|status|ocs/v[12]|updater/.+|ocs-provider/.+|core/templates/40[34])\.php(?:$|/) {
    include fastcgi_params;
    fastcgi_split_path_info ^(.+\.php)(/.*)$;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param PATH_INFO $fastcgi_path_info;
    fastcgi_param modHeadersAvailable true; #Avoid sending the security headers twice
    fastcgi_param front_controller_active true;
    fastcgi_pass php-fpm-handler;
    fastcgi_intercept_errors on;
    fastcgi_request_buffering off;
    fastcgi_read_timeout 1200;
  }

  location ~ ^/(?:updater|ocs-provider)(?:$|/) {
    try_files $uri/ =404;
    index index.php;
  }

  # Adding the cache control header for js and css files
  # Make sure it is BELOW the location ~ \.php(?:$|/) { block
  location ~ \.(?:css|js|woff|svg|gif)$ {
    try_files $uri /index.php$uri$is_args$args;
    add_header Cache-Control "public, max-age=15778463";
    add_header Strict-Transport-Security max-age=15768000;
    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Robots-Tag none;
    add_header X-Download-Options noopen;
    add_header X-Permitted-Cross-Domain-Policies none;
    access_log off;
  }

  location ~ \.(?:png|html|ttf|ico|jpg|jpeg)$ {
    try_files $uri /index.php$uri$is_args$args;
    access_log off;
  }

  # collabora static files
  location ^~ /loleaflet {
    proxy_pass https://collabora-handler;
    proxy_set_header Host $http_host;
  }

  # collabora WOPI discovery URL
  location ^~ /hosting/discovery {
    proxy_pass https://collabora-handler;
    proxy_set_header Host $http_host;
  }

  # collabora main websocket
  location ~ ^/lool/(.*)/ws$ {
      proxy_pass https://collabora-handler;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "Upgrade";
      proxy_set_header Host $http_host;
      proxy_read_timeout 36000s;
  }

  # collabora download, presentation and image upload
  location ~ ^/lool {
      proxy_pass https://collabora-handler;
      proxy_set_header Host $http_host;
  }

  # collabora Admin Console websocket
  location ^~ /lool/adminws {
      proxy_pass https://collabora-handler;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "Upgrade";
      proxy_set_header Host $http_host;
      proxy_read_timeout 36000s;
  }
}

Thank you. I wanted to not include nginx/apache proxy for collabora as I already have traefik, but I guess it's not going to be that easy..

Thank you. Now I have to figure out how to make this work:
www -> traefik -> collabora ==> Not working, the 9980 port is not returning anything
www -> traefik -> nginx-proxy (based on this file) -> collabora ===> did not tested yet...