docker: fix build

ops/scripts/detector.sh

+#!/bin/bash
+
+set -e
+
+RETRIES=${RETRIES:-60}
+
+# waits for l2geth to be up
+curl \
+    --fail \
+    --show-error \
+    --silent \
+    --output /dev/null \
+    --retry-connrefused \
+    --retry $RETRIES \
+    --retry-delay 1 \
+    $FAULT_DETECTOR__L2_RPC_PROVIDER
+
+# go
+exec yarn start