Add VK callback auth support and admin demotion

deploy/nginx/vk.daemonlord.ru.conf

@@ -0,0 +1,35 @@
+server {
+    listen 80;
+    server_name vk.daemonlord.ru;
+
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443 ssl http2;
+    server_name vk.daemonlord.ru;
+
+    ssl_certificate /etc/letsencrypt/live/vk.daemonlord.ru/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/vk.daemonlord.ru/privkey.pem;
+
+    location = /vk/callback {
+        proxy_pass http://127.0.0.1:8787/vk/callback;
+        proxy_http_version 1.1;
+        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-Proto https;
+        proxy_buffering off;
+    }
+
+    location = /health {
+        proxy_pass http://127.0.0.1:8787/health;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Proto https;
+    }
+
+    location / {
+        return 404;
+    }
+}