docker: have geth wait for dtl to be up before starting (#436)

* docker: have geth wait for dtl to be up before starting

* chore: update comment on geth.sh
Co-authored-by: Georgios Konstantopoulos <me@gakonst.com>

ops/scripts/geth.sh

@@ -19,4 +19,7 @@ if [ $ETH1_L1_ETH_GATEWAY_ADDRESS == null ]; then
     envSet ETH1_L1_ETH_GATEWAY_ADDRESS OVM_L1ETHGateway
 fi
 
+# wait for the dtl to be up, else geth will crash if it cannot connect
+curl --retry-connrefused --retry $RETRIES --retry-delay 2 $ROLLUP_CLIENT_HTTP
+
 exec geth --verbosity=6