Update deploy-prod.yml workflow to mount identity.key volume

or

`Add volume mount to deploy-prod.yml workflow`

Author: p-shubh

.github/workflows/deploy-prod.yml

@@ -99,4 +99,5 @@ jobs:
           docker image rm ghcr.io/netsepio/gateway:v1.1
           echo ${{ secrets.GHCR_TOKEN }} | docker login ghcr.io -u ${{ secrets.GHCR_USERNAME }} --password-stdin
           docker pull ghcr.io/netsepio/gateway:v1.1
-          docker run --restart=on-failure:14 --dns=1.1.1.1 --name="gateway_v1_1" --env-file=.env -p 3001:3000 --net=netsepio_prod_network -d ghcr.io/netsepio/gateway:v1.1
+          docker run --restart=on-failure:14 --dns=1.1.1.1 --name="gateway_v1_1" --env-file=.env -p 3001:3000 --net=netsepio_prod_network -v "$(pwd)/identity.key:/app/secret/identity.key" -d ghcr.io/netsepio/gateway:v1.1
+