add nginx.conf and improve readme

keycloak/nginx.conf

@@ -0,0 +1,17 @@
+server {
+        server_name sudomain.your.domain;
+        client_max_body_size 15M;
+
+location / {
+        proxy_pass http://127.0.0.1:8080/;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Host $server_name;
+        proxy_set_header X-Forwarded-Server $host;
+        proxy_set_header X-Forwarded-Port $server_port;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    listen 80;
+}