Document how to integrate uStreamer with nginx

This change documents a gotcha that can occur when clients deploy uStreamer behind an nginx proxy. By default, nginx buffers responses, which introduces latency into the video stream. Disabling the buffer eliminates this latency.

README.md

@@ -76,6 +76,24 @@ $ ./ustreamer \
 
 You can always view the full list of options with ```ustreamer --help```.
 
+---
+# Integrations
+
+## nginx
+
+When uStreamer is behind an nginx proxy, nginx's buffering behavior introduces latency into the video stream. It's possible to disable nginx's buffering to eliminate the additional latency:
+
+```text
+location /stream {
+  # Disable buffering for uStreamer video stream
+  postpone_output 0;
+  proxy_buffering off;
+  proxy_ignore_headers X-Accel-Buffering;
+
+  proxy_pass http://ustreamer;
+}
+```
+
 -----
 # Raspberry Pi Camera Example
 Example usage for the Raspberry Pi v1 camera: