Add NGINX and Apache HTTP reverse proxy examples

docs/examples/apache/.htaccess

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+# Create a rdio-scanner subfolder under the DOCUMENT_ROOT and put this file in it.
+# Don't forget to change 127.0.0.1:3000 to the internal IP of your Rdio Scanner instance.
+
+DirectoryIndex index.html
+
+RewriteEngine on
+
+RewriteCond %{HTTP:CONNECTION} ^upgrade$ [NC,OR]
+RewriteCond %{HTTP:UPGRADE} ^websocket$ [NC]
+RewriteRule ^/?(.*)$ ws://127.0.0.1:3000/$1 [P,L]
+RewriteRule ^/?(.*)$ http://127.0.0.1:3000/$1 [P,L] 

docs/examples/apache/README.md

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+# Apache HTTP server
+
+Simple Apache HTTP `.htaccess` to reverse proxy to an internal Rdio Scanner instance.

docs/examples/nginx/README.md

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+# NGINX
+
+Simple NGINX configuration that reverse proxy /rdio-scanner path to an internal instance.

docs/examples/nginx/nginx.conf

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+worker_processes  auto;
+
+error_log  /var/log/nginx/error.log notice;
+pid        /var/run/nginx.pid;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    sendfile on;
+    keepalive_timeout 65;
+
+	map $http_upgrade $connection_upgrade {
+		default upgrade;
+		'' close;
+	}
+
+	upstream rdio-scanner {
+		server 127.0.0.1:3000;
+	}
+
+	server {
+		listen 80 default_server;
+		listen [::]:80 default_server;
+
+		# listen 443 ssl default_server;
+		# listen [::]:443 ssl default_server;
+		#
+		# ssl_certificate /etc/ssl/certs/ssl-cert-snakeoil.pem;
+		# ssl_certificate_key /etc/ssl/private/ssl-cert-snakeoil.key;
+
+		root /var/www/html;
+
+		index index.html index.htm;
+
+		server_name _;
+
+		location / {
+			try_files $uri $uri/ =404;
+		}
+
+		location /rdio-scanner/ {
+			rewrite ^/rdio-scanner/(.*)$ /$1 break;
+			proxy_pass http://rdio-scanner;
+		}
+
+		proxy_http_version 1.1;
+		proxy_set_header Connection $connection_upgrade;
+		proxy_set_header Host $host;
+		proxy_set_header Upgrade $http_upgrade;
+		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	}
+}