force the explorer to wait for the local indexer

docker/my-dojo/explorer/Dockerfile

@@ -7,6 +7,11 @@ ENV     EXPLORER_URL         https://github.com/janoside/btc-rpc-explorer/archiv
 ENV     EXPLORER_VERSION     1.1.5
 
 
+# Install netcat
+RUN     set -ex && \
+        apt-get update && \
+        apt-get install -y netcat
+
 # Create logs  and apps directory
 RUN     mkdir -p "$LOGS_DIR" && \
         chown -R node:node "$LOGS_DIR" && \

docker/my-dojo/explorer/restart.sh

@@ -22,6 +22,23 @@ explorer_options+=(--rpc-blacklist "addnode,analyzepsbt,clearbanned,combinepsbt,
 if [ "$NODE_ACTIVE_INDEXER" == "local_indexer" ]; then
   explorer_options+=(--address-api electrumx)
   explorer_options+=(--electrumx-servers "tcp://$INDEXER_IP:$INDEXER_RPC_PORT")
+
+  # Wait for the local indexer
+  timeout="720"
+  i="0"
+  while [ $i -lt $timeout ]
+  do
+    nc -z "$INDEXER_IP" "$INDEXER_RPC_PORT" > /dev/null
+    if [ $? -eq 0 ] ; then
+      break
+    fi
+    sleep 1
+    i=$[$i+1]
+  done
+  if [ $i -eq $timeout ]; then
+    echo "Operation timed out"
+    exit 1
+  fi
 fi
 
 node ./bin/cli.js "${explorer_options[@]}" > /data/logs/explorer-error.log  2> /data/logs/explorer-output.log