fixed the name and variables

IT-Tools/.env.example

@@ -1,2 +1,7 @@
-# Main interface port for accessing the application
-IT_TOOLS_PORT="8000"
+# IT-Tools Docker Compose Environment Variables
+
+# Container image version tag (e.g. "latest" or a specific release tag)
+IT-TOOLS_VERSION=latest
+
+# Host port to expose the IT-Tools web UI on
+IT-TOOLS_PORT=8000