Switch Technitium DNS servers to host networking

- Remove bridge network port mappings
- Add network_mode: host for both dns01 and dns02
- Enables proper cluster communication and NOTIFY messages
- Fixes 'Unreachable' cluster status between nodes

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

stacks/technitium_syn01.compose.yml

@@ -7,20 +7,7 @@ services:
     cpu_shares: 768
     security_opt:
       - no-new-privileges:true
-    ports:
+    network_mode: host
-      - "53:53/udp"
-      - "53:53/tcp"
-      - "5380:5380/tcp"   # HTTP console
-      - "53443:53443/tcp" # HTTPS console
-      # DNS over TLS, HTTPS, QUIC
-      #  - "853:853/udp"    # DNS-over-QUIC
-      #  - "853:853/tcp"    # DNS-over-TLS
-      #  - "443:443/udp"    # DNS-over-HTTPS (HTTP/3)
-      #  - "443:443/tcp"    # DNS-over-HTTPS
-      #  - "80:80/tcp"      # DNS-over-HTTP
-      #  - "8053:8053/tcp"  # DNS-over-HTTPS (alt port)
-      # DHCP
-      #  - "67:67/udp"      # DHCP
     volumes:
       - /volume1/docker/technitium/config:/etc/dns:rw
     environment:

stacks/technitium_syn02.compose.yml

@@ -7,20 +7,7 @@ services:
     cpu_shares: 768
     security_opt:
       - no-new-privileges:true
-    ports:
+    network_mode: host
-      - "53:53/udp"
-      - "53:53/tcp"
-      - "5380:5380/tcp"   # HTTP console
-      - "53443:53443/tcp" # HTTPS console
-      # DNS over TLS, HTTPS, QUIC
-      #  - "853:853/udp"    # DNS-over-QUIC
-      #  - "853:853/tcp"    # DNS-over-TLS
-      #  - "443:443/udp"    # DNS-over-HTTPS (HTTP/3)
-      #  - "443:443/tcp"    # DNS-over-HTTPS
-      #  - "80:80/tcp"      # DNS-over-HTTP
-      #  - "8053:8053/tcp"  # DNS-over-HTTPS (alt port)
-      # DHCP
-      #  - "67:67/udp"      # DHCP
     volumes:
       - /volume2/docker/technitium/config:/etc/dns:rw
     environment: