Added Doc for installing behind revprox

Install-behindNginxRevProx.md

@@ -0,0 +1,98 @@
+# Installing in network with existing Nginx reverse proxy
+
+## Forwarding Webui,and api/agent connection path
+Nginx config
+```
+map $http_upgrade $connection_upgrade {
+        default upgrade;
+        '' close;
+    }
+
+    server {
+	listen       80;
+        listen       [::]:80;
+        server_name  _;
+
+         location / { {
+            proxy_pass http://<ip of internall shellhub host>;
+            proxy_set_header Host $host;
+            proxy_set_header X-Scheme $scheme;
+            proxy_set_header X-Real-IP $remote_addr;
+
+        }
+         location ~ ^/(ssh|ws)/ {
+            proxy_pass http://<ip of internall shellhub host>;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection $connection_upgrade;
+            proxy_set_header Host $host;
+        }
+}
+```
+
+## Forwarding only api/agent connection path
+```
+map $http_upgrade $connection_upgrade {
+        default upgrade;
+        '' close;
+    }
+
+    server {
+	listen       80 default_server;
+        listen       [::]:80 default_server;
+        server_name  _;
+
+         location / {
+            return 403;
+        }
+
+         location ~ ^/(info|api|auth|install.sh|kickstart.sh) {
+            proxy_pass http://<ip of internall shellhub host>;
+            proxy_set_header Host $host;
+            proxy_set_header X-Scheme $scheme;
+            proxy_set_header X-Real-IP $remote_addr;
+
+        }
+         location /ssh/ {
+            proxy_pass http://<ip of internall shellhub host>;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection $connection_upgrade;
+            proxy_set_header Host $host;
+        }
+}
+```
+
+## Forwarding only Webui
+
+```
+map $http_upgrade $connection_upgrade {
+        default upgrade;
+        '' close;
+    }
+
+    server {
+	listen       80 default_server;
+        listen       [::]:80 default_server;
+        server_name  _;
+
+         location / {
+            proxy_pass http://<ip of internall shellhub host>;
+            proxy_set_header Host $host;
+            proxy_set_header X-Scheme $scheme;
+            proxy_set_header X-Real-IP $remote_addr;
+
+        }
+
+         location ~ ^/(info|auth|install.sh|kickstart.sh) {
+            return 403;
+        }
+         location /ws/ {
+            proxy_pass http://<ip of internall shellhub host>;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection $connection_upgrade;
+            proxy_set_header Host $host;
+        }
+}
+```