Default upstream DNS to Google and remove the mention of the environment variable from the quickstart compose file.

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

README.md

@@ -48,8 +48,6 @@ services:
       TZ: 'Europe/London'
       # Set a password to access the web interface. Not setting one will result in a random password being assigned
       FTLCONF_webserver_api_password: 'correct horse battery staple'     
-      # Configure DNS upstream servers, e.g:
-      FTLCONF_dns_upstreams: '8.8.8.8;8.8.4.4'
     # Volumes store your data between container upgrades
     volumes:
       # For persisting Pi-hole's databases and common configuration file

examples/docker-compose-caddy-proxy.yml

@@ -36,8 +36,6 @@ services:
       TZ: 'Europe/London'
       # Set a password to access the web interface. Not setting one will result in a random password being assigned
       FTLCONF_webserver_api_password: 'correct horse battery staple'     
-      # Configure DNS upstream servers, e.g:
-      FTLCONF_dns_upstreams: '8.8.8.8;8.8.4.4'
     # Volumes store your data between container upgrades
     volumes:
       # For persisting Pi-hole's databases and common configuration file

src/bash_functions.sh

@@ -63,11 +63,8 @@ ensure_basic_configuration() {
 
     # If getFTLConfigValue "dns.upstreams" returns [], exit the container. We need upstream servers to function!
     if [[ $(getFTLConfigValue "dns.upstreams") == "[]" ]]; then                
-        echo ""
-        echo "  [X] No DNS upstream servers are set!"
-        echo "  [i] Recommended: Set the upstream DNS servers in the environment variable FTLCONF_dns_upstreams"
-        echo ""
-        exit 1
+        echo "  [i] No DNS upstream set in environment or config file, defaulting to Google DNS"        
+        setFTLConfigValue "dns.upstreams" "[\"8.8.8.8\", \"8.8.4.4\"]"        
     fi
 
     setup_web_password