Move environment variables to .env file

docker-compose.yml

@@ -7,15 +7,9 @@ services:
     ports:
       - "53:53/tcp"
       - "53:53/udp"
-        #- "67:67/udp" # Only required if you are using Pi-hole as your DHCP server
       - "8000:80/tcp"
-    environment:
-      TZ: 'Europe/Berlin'
-      WEBPASSWORD: ${WEB_PASSWORD} 
-      FTLCONF_LOCAL_IPV4: ${FTLCONF_LOCAL_IPV4}
-        #      FTLCONF_LOCAL_IPV6: ${FTLCONF_LOCAL_IPV6} 
-      FTLCONF_RATE_LIMIT: '0/0'
-    # Volumes store your data between container upgrades
+    env_file:
+      - .env
     volumes:
       - './etc-pihole:/etc/pihole'
       - './etc-dnsmasq.d:/etc/dnsmasq.d'