scripts: fix run_regtest.sh electrs panic

By default electrs serves Prometheus metrics on 127.0.0.1:24224 for
regtest. Because we run two electrs containers one always panic
because the port is alrady in use. This commit configures one of the two
electrs servers to serve metrics on 24225 instead to avoid the crash.

Author: NicolaLS

scripts/run_regtest.sh

@@ -50,6 +50,7 @@ BITCOIND_PORT=12340
 BITCOIND_RPC_PORT=10332
 ELECTRS_RPC_PORT1=52001
 ELECTRS_RPC_PORT2=52002
+ELECTRS_MONITORING_PORT2=24225
 
 docker run -v $BITCOIN_DATADIR:/bitcoin/.bitcoin --name=bitcoind-regtest \
        -e DISABLEWALLET=0 \
@@ -97,6 +98,7 @@ docker run \
         --daemon-rpc-addr=${DOCKER_IP}:${BITCOIND_RPC_PORT} \
         --daemon-p2p-addr=${DOCKER_IP}:${BITCOIND_PORT} \
         --electrum-rpc-addr=127.0.0.1:${ELECTRS_RPC_PORT2} \
+        --monitoring-addr=127.0.0.1:${ELECTRS_MONITORING_PORT2} \
         --daemon-dir=/bitcoin/.bitcoin \
         --db-dir=/data &