Help translating nginx config for Nextcloud in Docker

I can’t use volumes_from since I’m not using docker-compose. Still, that should be possible using Portainer. However, I’ve looked around some more and found a nice V1 config which seems to be exactly what I want, and not require mounting any Nextcloud volumes in the Caddy container, but being for V1, it has some rewrite directives which don’t work on V2. Would you be able to help me out translating these for V2? The config is as follows:

nextcloud.domain.tld {

        root   /var/www/nextcloud
        log    /var/log/nextcloud_access.log
        errors /var/log/nextcloud_errors.log

        fastcgi / 127.0.0.1:9000 php {
                env PATH /bin
                env modHeadersAvailable true
                env front_controller_active true
                connect_timeout 60s
                read_timeout 3600s
                send_timeout 300s
        }

        header / {
                Strict-Transport-Security               "max-age=15768000;"
                X-Content-Type-Options                  "nosniff"
                X-XSS-Protection                        "1; mode=block"
                X-Robots-Tag                            "none"
                X-Download-Options                      "noopen"
                X-Permitted-Cross-Domain-Policies       "none"
                Referrer-Policy                         "no-referrer"
        }

        header /core/fonts {
                Cache-Control                           "max-age=604800"
        }

        # checks for images
        rewrite {
                ext .png .html .ttf .ico .jpg .jpeg .css .js .woff .woff2 .svg .gif .map
                r ^/index.php/.*$
                to /{1} /index.php?{query}
        }

        rewrite {
                r ^/\.well-known/host-meta$
                to /public.php?service=host-meta&{query}
        }
        rewrite {
                r ^/\.well-known/host-meta\.json$
                to /public.php?service=host-meta-json&{query}
        }
        rewrite {
                r ^/\.well-known/webfinger$
                to /public.php?service=webfinger&{query}
        }

        rewrite {
                r ^/index.php/.*$
                to /index.php?{query}
        }

        rewrite / {
                if {path} not_starts_with /remote.php
                if {path} not_starts_with /public.php
                ext .png .html .ttf .ico .jpg .jpeg .css .js .woff .woff2 .svg .gif .map .html .ttf 
                r ^/(.*)$
                to /{1} /index.php{uri}
        }

        rewrite / {
                if {path} not /core/img/favicon.ico
                if {path} not /core/img/manifest.json
                if {path} not_starts_with /remote.php
                if {path} not_starts_with /public.php
                if {path} not_starts_with /cron.php
                if {path} not_starts_with /core/ajax/update.php
                if {path} not_starts_with /status.php
                if {path} not_starts_with /ocs/v1.php
                if {path} not_starts_with /ocs/v2.php
                if {path} not /robots.txt
                if {path} not_starts_with /updater/
                if {path} not_starts_with /ocs-provider/
                if {path} not_starts_with /ocm-provider/ 
                if {path} not_starts_with /.well-known/
                to /index.php{uri}
        }

        # client support (e.g. os x calendar / contacts)
        redir /.well-known/carddav /remote.php/carddav 301
        redir /.well-known/caldav /remote.php/caldav 301

        # remove trailing / as it causes errors with php-fpm
        rewrite {
                r ^/remote.php/(webdav|caldav|carddav|dav)(\/?)(\/?)$
                to /remote.php/{1}
        }

        rewrite {
                r ^/remote.php/(webdav|caldav|carddav|dav)/(.+?)(\/?)(\/?)$
                to /remote.php/{1}/{2}
        }

        rewrite {
                r ^/public.php/(dav|webdav|caldav|carddav)(\/?)(\/?)$
                to /public.php/{1}
        }

        rewrite {
                r ^/public.php/(dav|webdav|caldav|carddav)/(.+)(\/?)(\/?)$
                to /public.php/{1}/{2}
        }

        # .htaccess / data / config / ... shouldn't be accessible from outside
        status 404 {
                /.htaccess
                /data
                /config
                /db_structure
                /.xml
                /README
                /3rdparty
                /lib
                /templates
                /occ
                /console.php
        }

}

(Shamelessly stolen from another question: Nextcloud with FastCGI and Docker)