Creating new Lumen app on nginx throwing 404 when

I am trying to create a plain Lumen application on ngnix server on Digital Ocean. Following the official documentation for Laravel, I followed everything as it is said until the Laravel Installation bit.

Just instead of this

composer create-project laravel/laravel /var/www/lumen/ 4.1

I used

composer create-project --prefer-dist laravel/lumen blog` instead.

The Lumen document seems on the directory now when I use ls.

However when I hit the IP address, or IPAdress/index.php, it shows

404 Not Found - nginx/1.4.6 (Ubuntu)

Also, this is my configuration for Virtual Host file (nano /etc/nginx/sites-available/default)`:

server {
        listen   80 default_server;

        root /var/www/laravel/public/;
        index index.php index.html index.htm;

        location / {
             try_files $uri $uri/ /index.php$is_args$args;
        }

        # pass the PHP scripts to FastCGI server listening on /var/run/php5-fpm.sock
        location ~ \.php$ {
                try_files $uri /index.php =404;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                include fastcgi_params;
        }
}

What am I doing wrong or missing?

Also, if I try connect to the SSH directory with PhpStorm, I received an error:

ssh://root@46.101.172.134:22null /usr/bin/php
env: /var/www/Lumen: Permission denied

Process finished with exit code 126

Please also check this question for further info on this error..

Edit 2:

I tried changing my server to..

server { listen 80 default_server; listen [::]:80 default_server ipv6only=on;

listen 443 ssl;

root /var/www/lumen/public;
index index.php index.html index.htm;

server_name IPAddress;
ssl_certificate /etc/nginx/ssl/nginx.crt;    // I didn't set this
ssl_certificate_key /etc/nginx/ssl/nginx.key;  //  and this

location / {
    try_files $uri $uri/ /index.php?$query_string;
}

location ~ \.php$ {
    try_files $uri /index.php =404;
    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    fastcgi_pass unix:/var/run/php5-fpm.sock;
    fastcgi_index index.php;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
}

}

I used this guide to create an SSL Certificate on nginx. Then, hitting http://ipaddress gives me the Lumen/Laravel stuff.