(feat): use lets encrypt

nginx/default.conf

     listen 80;
     listen 443;
 
+    ssl_certificate /etc/letsencrypt/archive/event.leecy.org.tw/fullchain1.pem;
+    ssl_certificate_key /etc/letsencrypt/archive/event.leecy.org.tw/privkey1.pem;
+
     location / {
         index index.html;
         root /var/www/fe;