refactor : reorganize infra files into infra/dev and infra/prod

Consolidate Docker, Nginx, and deploy configs from 5 scattered directories
(docker/, deploy/docker/, deploy/nginx/, script/) into a single infra/ tree
with dev/ and prod/ subdirectories. Update all references in docker-compose,
Makefile, CI workflows, Dockerfiles, and documentation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

infra/dev/nginx.conf

@@ -0,0 +1,59 @@
+server {
+    listen 80;
+    server_name localhost;
+
+    root /var/www/html/frontend/dist;
+    index index.html;
+
+    client_max_body_size 55m;
+
+    location ^~ /_mcp {
+        root /var/www/html/public;
+        try_files $uri /index.php?$query_string;
+    }
+
+    location ^~ /api/ {
+        root /var/www/html/public;
+        try_files $uri /index.php?$query_string;
+    }
+
+    location ^~ /_wdt/ {
+        root /var/www/html/public;
+        try_files $uri /index.php?$query_string;
+    }
+
+    location ^~ /_profiler/ {
+        root /var/www/html/public;
+        try_files $uri /index.php?$query_string;
+    }
+
+    location ^~ /bundles/ {
+        root /var/www/html/public;
+        try_files $uri =404;
+    }
+
+    location = /api/login_check {
+        include fastcgi_params;
+        fastcgi_param SCRIPT_FILENAME /var/www/html/public/index.php;
+        fastcgi_param DOCUMENT_ROOT /var/www/html/public;
+        fastcgi_param SCRIPT_NAME /index.php;
+        fastcgi_param PATH_INFO /login_check;
+        fastcgi_param REQUEST_URI /login_check;
+        fastcgi_pass php:9000;
+    }
+
+    location ~ ^/index\.php(/|$) {
+        include fastcgi_params;
+        fastcgi_param SCRIPT_FILENAME /var/www/html/public/index.php;
+        fastcgi_param DOCUMENT_ROOT /var/www/html/public;
+        fastcgi_pass php:9000;
+    }
+
+    location ~ \.php$ {
+        return 404;
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}