feat: add ping script

.github/workflows/docker-compose-testing.yml

@@ -63,6 +63,7 @@ jobs:
       - name: Ping services
         timeout-minutes: 5
         run: |
+          cd ./docker-compose
           chmod +x ./ping.sh
           ./ping.sh
       - name: Install node

docker-compose/ping.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+set -eu pipefail
+set echo off
+
+# functions
+ping()
+{
+    local service=$1
+    local port=$2
+    shift; shift;
+    COMMENTS=$@
+    echo "Pending $service-api"
+    until $(nc -zv localhost "$port"); do
+        printf '.'
+        sleep 5
+    done
+    echo "$service-api livez!"
+}
+
+# main
+ping wallet 7001
+ping issuer 7002
+ping verifier 7003