feat: add workflow to build + test docker container (#1278)

scripts/wait_for_service.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+# wait-for-it.sh
+
+set -e
+
+host="$1"
+shift
+cmd="$@"
+
+until curl -s "$host" > /dev/null; do
+  >&2 echo "Service is unavailable - sleeping"
+  sleep 1
+done
+
+>&2 echo "Service is up - executing command"
+exec $cmd