Update docker env example

Author: RogerPodacter

docker-compose/.env.example

@@ -7,18 +7,18 @@ COMPOSE_BAKE=true
 # L1 / genesis configuration
 L1_NETWORK=mainnet
 L1_GENESIS_BLOCK=17478949
-L1_RPC_URL=https://ethereum-rpc.publicnode.com
 GENESIS_FILE=ethscriptions-mainnet.json
 
-# Engine API auth
-JWT_SECRET=0x0101010101010101010101010101010101010101010101010101010101010101
-
-# Importer performance tuning
-L1_PREFETCH_FORWARD=100
-L1_PREFETCH_THREADS=5
+# If you have a non-public high-performance RPC you can set forward
+# to something like 100 and threads to 10
+L1_RPC_URL=https://ethereum-rpc.publicnode.com
+L1_PREFETCH_FORWARD=2
+L1_PREFETCH_THREADS=1
 
 # Geth tuning
 GETH_EXTERNAL_PORT=8545
 GETH_CACHE_SIZE=25000
 ENABLE_PREIMAGES=false
 GC_MODE=archive
+
+JWT_SECRET=0x0101010101010101010101010101010101010101010101010101010101010101