do fantom with opera smarter

fantom/scripts/entrypoint.opera.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+# exit script on any error
+set -e
+
+datadir=/datadir
+FANTOM_HOME="$datadir"
+
+url="${GENESIS:-https://download.fantom.network/opera/mainnet/mainnet-5577-full-mpt.g}"
+filename=$(basename "$url")
+
+if [ ! -f "$datadir/bootstrapped" ]; then
+    echo "Initializing Opera..."
+
+    if [ ! -f "$datadir/$filename" ]; then
+        wget -P "$datadir" "$url"
+    fi
+    
+    touch "$datadir/bootstrapped"
+
+    echo "Initialization complete."
+else
+    echo "Opera is already initialized."
+fi
+
+# uncomment the next line and do docker-compose build in case you have to try to fix the db after unclean shutdown etc.
+# opera --db.preset pbl-1 --datadir=$datadir db heal --experimental
+
+# always make a new nodekey
+
+echo "Generating new Geth node key..."
+openssl rand 32 | xxd -p -c 32 | tr -d '\n' > "$datadir/nodekey"
+
+exec opera --nodekey="$datadir/nodekey" --genesis="$datadir/$filename" --datadir="$datadir" "$@"