Laravel, nginx, AWS EC2で404エラーになる

前提

Laravel9, PHP8.1, nginxで作ったWEBアプリをAWSでデプロイしたいです。
nginxを起動すると、パブリックIPで404エラーが出ます。

該当のソースコード

以下の記事を参考にnginxの設定ファイルを作成しました。
ちなみに、初期設定だとnginxのページがちゃんと表示されていました。
https://qiita.com/yyy752/items/9cec9c44e8a389cb9c18

nginx.conf
1user nginx;
2worker_processes auto;
3error_log /var/log/nginx/error.log;
4pid /run/nginx.pid;
5
6# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
7include /usr/share/nginx/modules/*.conf;
8
9events {
10    worker_connections 1024;
11}
12
13http {
14    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
15                      '$status $body_bytes_sent "$http_referer" '
16                      '"$http_user_agent" "$http_x_forwarded_for"';
17
18    access_log  /var/log/nginx/access.log  main;
19
20    sendfile            on;
21    tcp_nopush          on;
22    tcp_nodelay         on;
23    keepalive_timeout   65;
24    types_hash_max_size 4096;
25
26    include             /etc/nginx/mime.types;
27    default_type        application/octet-stream;
28
29    # Load modular configuration files from the /etc/nginx/conf.d directory.
30    # See http://nginx.org/en/docs/ngx_core_module.html#include
31    # for more information.
32    include /etc/nginx/conf.d/*.conf;
33
34    server {
35        listen       80;
36        listen       [::]:80;
37        server_name  _;
38        root         /var/www/app/public;
39
40        add_header X-Frame-Options "SAMEORIGIN"; 
41        add_header X-Content-Type-Options "nosniff";
42
43        index index.php;
44
45        charset utf-8;
46
47        location / {
48            try_files $uri $uri/ /index.php?$query_string;
49        }
50
51        location ~ \.php$ {
52            fastcgi_pass   unix:/run/php-fpm/www.sock;
53            fastcgi_index  index.php;
54            fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
55            include        fastcgi_params;
56        }
57
58        location ~ /\.(?!well-known).* {
59            deny all;
60        }
61
62        # Load configuration files for the default server block.
63        include /etc/nginx/default.d/*.conf;
64
65        error_page 404 /404.html;
66            location = /404.html {
67        }
68
69        error_page 500 502 503 504 /50x.html;
70            location = /50x.html {
71        }
72    }

試したこと

$ ls public/
css favicon.ico images index.php js mix-manifest.json phpinfo.php robots.txt storage

$ ls -l public/
drwxrwxrwx 5 ec2-user ec2-user 171 7月 30 13:28 public

$ sudo systemctl status nginx.service
● nginx.service - The nginx HTTP and reverse proxy server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2022-07-30 15:37:28 UTC; 1h 13min ago
  Process: 7636 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
  Process: 7632 ExecStartPre=/usr/sbin/nginx -t (code=exited, status=0/SUCCESS)
  Process: 7631 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited, status=0/SUCCESS)
 Main PID: 7638 (nginx)
   CGroup: /system.slice/nginx.service
           ├─7638 nginx: master process /usr/sbin/nginx
           └─7639 nginx: worker process

$ sudo groupadd www
$ sudo usermod -a -G www ec2-user
$ sudo chown -R root:www /var/www
$ sudo chmod 2775 /var/www
/var/www/appで$ chmod -R 777 storage
/var/www/appで$ chmod -R 777 bootstrap/cache

var/log/error.log
12022/07/30 17:31:16 [crit] 8549#8549: *2 connect() to unix:/run/php-fpm/www.sock failed (2: No such file or directory) while connecting to upstream, client: 119.82.177.188, server: _, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "パブリックIP"
22022/07/30 17:31:16 [error] 8549#8549: *2 open() "/var/www/app/public/50x.html" failed (2: No such file or directory), client: 119.82.177.188, server: _, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/run/php-fpm/www.sock", host: "パブリックIP"
3

エラーを読んで、記事を漁っていたらLaravel側のエラー説が出てきました。

storage/logs/laravel.log
1[2022-07-31 03:02:17] local.ERROR: Target class [App\Models\post] does not exist. {"exception":"[object] (Illuminate\\Contracts\\Container\\BindingResolutionException(code: 0): Target class [App\\Models\\post] does not exist. at /var/www/sugi-ura/src/vendor/laravel/framework/src/Illuminate/Container/Container.php:877)