GCP Cloud Run returns Faithfully yours, nginx

I'm trying to host my laravel application in GCP cloud run and everything works just fine but for some reason whenever I run a POST request with lots of data saving to the database, it always throw an error. I'm using nginx with docker by the way. Please see the details below.

ERROR

Cloud Run Logs

The request has been terminated because it has reached the maximum request timeout.

nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}
http {
    include       mime.types;
    sendfile        on;
    keepalive_timeout  65;

    server {
        listen LISTEN_PORT default_server;
        server_name _;
        root /app/public;
        index index.php;
        charset utf-8;
        location / {
            try_files $uri $uri/ /index.php?$query_string;
        }

        location = /favicon.ico { access_log off; log_not_found off; }
        location = /robots.txt  { access_log off; log_not_found off; }
        access_log /dev/stdout;
        error_log /dev/stderr;
        sendfile off;
        client_max_body_size 100m;

        location ~ \.php$ {
            fastcgi_split_path_info ^(.+\.php)(/.+)$;
            fastcgi_pass 127.0.0.1:9000;
            fastcgi_index index.php;
            include fastcgi_params;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            fastcgi_intercept_errors off;
            fastcgi_buffer_size 32k;
            fastcgi_buffers 8 32k;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

    }
    #include /etc/nginx/sites-enabled/*;
}

daemon off;

Dockerfile

FROM php:8.0-fpm-alpine

RUN apk add --no-cache nginx wget

RUN docker-php-ext-install mysqli pdo pdo_mysql

RUN mkdir -p /run/nginx

COPY docker/nginx.conf /etc/nginx/nginx.conf

RUN mkdir -p /app
COPY . /app

RUN sh -c "wget http://getcomposer.org/composer.phar && chmod a+x composer.phar && mv composer.phar /usr/local/bin/composer"
RUN cd /app && \
    /usr/local/bin/composer install --no-dev

RUN chown -R www-data: /app

CMD sh /app/docker/startup.sh

Laravel version:

v9

Please let me know if you need some data that is not indicated yet on my post.