feat: #263 add registry firewall rule

Author: bohdan-shulha

Diff for: scripts/self-hosted/install-agent.sh

@@ -121,6 +121,12 @@ if [ -z "$SKIP_CORE_INSTALL" ]; then
     iptables -I DOCKER-USER -p tcp -s 127.0.0.1 --dport 2019 -j ACCEPT
     iptables -I DOCKER-USER -p tcp --dport 2019 -j REJECT --reject-with tcp-reset
 
+    # Allow access to internal Docker Registry port
+    # Docker Registry will be available at registry.ptah.local:5050 on the overlay ptah_net network
+    iptables -I DOCKER-USER -p tcp -s 127.0.0.1 --dport 5050 -j ACCEPT
+    iptables -I DOCKER-USER -p tcp --dport 5050 -j REJECT --reject-with tcp-reset
+    echo '127.0.0.1 registry.ptah.local' >> /etc/hosts
+
     netfilter-persistent save
 
     rm -f /tmp/ptah-agent