Add 123/udp to docker compose example and Dockerfile

Signed-off-by: casperklein <casperklein@users.noreply.github.com>

README.md

@@ -67,8 +67,10 @@ services:
       - "80:80/tcp"
       # Default HTTPs Port. FTL will generate a self-signed certificate
       - "443:443/tcp"
-      # Uncomment the below if using Pi-hole as your DHCP Server
+      # Uncomment the line below if you are using Pi-hole as your DHCP server
       #- "67:67/udp"
+      # Uncomment the line below if you are using Pi-hole as your NTP server
+      #- "123:123/udp"
     environment:
       # Set the appropriate timezone for your location (https://en.wikipedia.org/wiki/List_of_tz_database_time_zones), e.g:
       TZ: 'Europe/London'

src/Dockerfile

@@ -82,6 +82,7 @@ COPY --chmod=0755 start.sh /usr/bin/start.sh
 EXPOSE 53 53/udp
 EXPOSE 67/udp
 EXPOSE 80
+EXPOSE 123/udp
 EXPOSE 443
 
 ## Buildkit can do some fancy stuff and we can use it to either download FTL from ftl.pi-hole.net or use a local copy