chore: add deployment runbook and server configs for kittisak.com

serverinfo/kittisak-nginx/admin.kittisak.com.conf

@@ -0,0 +1,31 @@
+server {
+    listen 80;
+    server_name admin.kittisak.com;
+
+    location /.well-known/acme-challenge/ {
+        root /var/www/certbot;
+    }
+    location / {
+        return 301 https://$host$request_uri;
+    }
+}
+
+server {
+    listen 443 ssl;
+    server_name admin.kittisak.com;
+
+    ssl_certificate /etc/letsencrypt/live/admin.kittisak.com/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/admin.kittisak.com/privkey.pem;
+
+    root /usr/share/nginx/html/kittisak/admin;
+    index index.html index.htm;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires max;
+        log_not_found off;
+    }
+}