Creating a redirect from a Laravel Forge site using nginx config only

nginx.conf

# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/oldsite.com/before/*;

server {
    http2 on;
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name oldsite.com;
    server_tokens off;
    root /home/forge/oldsite.com/public;

    # FORGE SSL (DO NOT REMOVE!)
    ssl_certificate /etc/nginx/ssl/academy.paulmueller.com/2652260/server.crt;
    ssl_certificate_key /etc/nginx/ssl/academy.paulmueller.com/2652260/server.key;

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_dhparam /etc/nginx/dhparams.pem;

    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Content-Type-Options "nosniff";

    index index.html index.htm index.php;

    charset utf-8;

    # FORGE CONFIG (DO NOT REMOVE!)
    include forge-conf/academy.paulmueller.com/server/*;

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

    # Redirect all requests to example.com preserving path and query string
    location / {
        return 301 https://example.com$request_uri;
    }

    location = /favicon.ico { access_log off; log_not_found off; }
    location = /robots.txt  { access_log off; log_not_found off; }

    access_log off;
    error_log  /var/log/nginx/academy.paulmueller.com-error.log error;

    error_page 404 /index.php;

    location ~ \.php$ {
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php/php8.3-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
    }

    location ~ /\.(?!well-known).* {
        deny all;
    }
}

# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/oldsite.com/after/*;

Forge's default nginx config with the default / location block replaced with a redirect.