chore: define env variable to gateway bind address

Closes #3478

Author: henrybarreto

.env

@@ -4,6 +4,9 @@
 # Automatically increased once a new release is out
 SHELLHUB_VERSION=v0.14.2
 
+# This specification details the network interface to which the gateway container will be bound.
+SHELLHUB_BIND_ADDRESS=0.0.0.0
+
 # The HTTP listen port for the ShellHub web-based GUI, API and Reverse SSH tunnel.
 # Values: any free port on host
 SHELLHUB_HTTP_PORT=80

docker-compose.yml

@@ -93,7 +93,7 @@ services:
       - api
       - ui
     ports:
-      - ${SHELLHUB_HTTP_PORT}:80
+      - ${SHELLHUB_BIND_ADDRESS}:${SHELLHUB_HTTP_PORT}:80
     networks:
       - shellhub
     healthcheck: