Created Running changedetection.io behind a reverse proxy sub directory (markdown)

Running-changedetection.io-behind-a-reverse-proxy-sub-directory.md

@@ -0,0 +1,34 @@
+In order to run a reverse proxy in the fashion: `http://domain.com/changedetectionio`<br>
+or another sub-directory.
+
+Make sure you are running with the environment variable<br>
+`USE_X_SETTINGS=1`
+
+This tells your webserver that you can use X-Forwarded-Prefix in your headers
+In apache it looks like this:
+
+```apache
+<Location /watcher>
+        RequestHeader set X-Forwarded-Prefix "/watcher"
+        ProxyPass "http://lan-ip:5000/"
+        ProxyPassReverse "http://lan-ip:5000/"
+</Location>
+```
+Your docker compose file should have:
+```yaml
+services:
+    changedetection:
+      image: ghcr.io/dgtlmoon/changedetection.io
+      container_name: changedetection
+      hostname: changedetection
+      volumes:
+        - changedetection-data:/datastore
+      ports:
+        - 5000:5000
+      restart: unless-stopped
+environment:
+      USE_X_SETTINGS=1
+volumes:
+  changedetection-data:
+```
+Along with whatever changes you would make