add example nginx for figment (#50)

Author: jhunsaker

doc/example-nginx-figment.conf

@@ -0,0 +1,30 @@
+worker_processes 1;
+
+events {}
+
+http {
+  include /etc/nginx/mime.types;
+
+  rewrite_log on;
+
+  keepalive_requests 2147483647; # int32 max
+
+  client_max_body_size 0;
+
+  server {
+    listen 7900;
+    location / {
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "Upgrade";
+        proxy_pass https://solana--mainnet.datahub.figment.io/apikey/YOUR_AUTH_TOKEN_HERE/;
+    }
+  }
+  server {
+    listen 7899;
+    location / {
+	proxy_http_version 1.1;
+	proxy_set_header Connection "";
+ 	proxy_pass https://solana--mainnet.datahub.figment.io/apikey/YOUR_AUTH_TOKEN_HERE/;
+    }
+  }
+}