Added ctf Nginx config

Added the Nginx config for the main ctf page
including https and http redirect rules using letsencrypt certificates.
Updated README.md

README.md

@@ -1 +1,11 @@
-# Minzkrauts home-made CTF
+# Minzkrauts home-made CTF
+
+## Letsencrypt certificates
+Navigate to certbot location and create certificate files with
+```
+sudo ./certbot-auto certonly --webroot -w var/www/html -d ctf.minzkraut.com --non-interactive --agree-tos --email {email}
+```
+Renew certificates and reload nginx with
+```
+sudo ./certbot-auto renew --webroot -w /var/www/html --post-hook "service nginx reload"
+```