add bisontrails example nginx config

Author: jhunsaker

doc/example-nginx-bisontrails.conf

@@ -0,0 +1,43 @@
+# generate YOUR_BASE64_USERPASS with `echo -n user:password | base64 -w0`
+# replace YOUR_NODE and YOUR_BASE64_USERPASS
+# docker run -v /path/to/nginx-bisontrails.conf:/etc/nginx/nginx.conf:ro -p 7899:7899 -p 7900:7900 -d docker.io/nginx
+
+worker_processes 1;
+
+events {}
+
+http {
+  include /etc/nginx/mime.types;
+
+  rewrite_log on;
+
+  keepalive_requests 2147483647; # int32 max
+
+  client_max_body_size 0;
+
+  upstream backend {
+    server YOUR_NODE:443;
+    keepalive 4;
+  }
+
+  server {
+    listen 7900;
+    location / {
+      proxy_set_header Upgrade $http_upgrade;
+      proxy_set_header Connection "Upgrade";
+      proxy_pass https://backend/ws;
+      proxy_set_header Authorization "Basic YOUR_BASE64_USERPASS";
+      proxy_set_header Host YOUR_NODE;
+    }
+  }
+  server {
+    listen 7899;
+    location / {
+      proxy_http_version 1.1;
+      proxy_set_header Connection "";
+      proxy_pass https://backend/rpc;
+      proxy_set_header Authorization "Basic YOUR_BASE64_USERPASS";
+      proxy_set_header Host YOUR_NODE;
+    }
+  }
+}