added FTLCONF_ because of https://github.com/pi-hole/docker-pi-hole/pull/944

docker-compose.yaml

@@ -22,6 +22,8 @@ services:
       DNS_FQDN_REQUIRED: ${DNS_FQDN_REQUIRED}
       TEMPERATUREUNIT: ${TEMPERATUREUNIT}
       WEBTHEME: ${WEBTHEME}
+      FTLCONF_MAXDBDAYS: ${MAXDBDAYS}
+      FTLCONF_DBINTERVAL: ${DBINTERVAL}
     # Volumes store your data between container upgrades
     volumes:
       - ./etc-pihole/:/etc/pihole/

example.env

@@ -37,3 +37,10 @@ TEMPERATUREUNIT=c
 # User interface theme to use.
 # "default-dark"|"default-darker"|"default-light"
 WEBTHEME="default-dark"
+
+# pihole-FTL.conf
+# How many days should Pi-hole store requests - discard older entries
+MAXDBDAYS=30
+
+# Write FTL database from RAM to SD card every x minutes. - Save SD card
+DBINTERVAL=60