Create nginx_setup.md (#138)

docs/nginx_setup.md

@@ -0,0 +1,53 @@
+# Nginx as reverse proxy
+
+Below theres an example of how the site configuration for nginx as a reverse proxy can look like:
+
+```
+map $http_upgrade $connection_upgrade {
+        default upgrade;
+        '' close;
+}
+
+server {
+        listen 80;
+        listen [::]:80;
+
+        servername spacedeck.domain.de
+
+        return 301 https://$server_name$request_uri;
+}
+
+server {
+        listen 443 ssl http2;
+        listen [::]:443 ssl http2;
+        ssl on;
+
+        server_name                             spacedeck.domain.de;
+
+        ssl_certificate                 /etc/ssl/spacedeck.domain.de.cer;
+        ssl_certificate_key             /etc/ssl/spacedeck.domain.de.key;
+
+        include ssl_params;
+
+        charset utf-8;
+        client_max_body_size 50m;
+
+        add_header Content-Security-Policy "default-src https: wss:; script-src https: 'unsafe-inline' 'unsafe-eval'; style-src https: 'unsafe-inline'";
+        add_header X-XSS-Protection "1; mode=block;";
+        add_header Referrer-Policy "no-referrer";
+
+        location / {
+                proxy_pass http://127.0.0.1:9666;
+                proxy_set_header X-Forwarded-For $remote_addr;
+        }
+
+        location /socket {
+                proxy_pass http://127.0.0.1:9666;
+                proxy_set_header Connection 'upgrade';
+                proxy_set_header Upgrade $http_upgrade;
+                proxy_http_version 1.1;
+                proxy_set_header Host $host;
+                proxy_cache_bypass $http_upgrade;
+        }
+}
+```