add smoke test

docker/smoke-test

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+HERE=$(realpath  "$(dirname $0)")
+. $HERE/common
+
+wait_for()
+{
+    echo "waiting up to $TIMEOUT seconds for app"
+    start_ts=$(date +%s)
+    for i in $(seq $TIMEOUT); do
+        result="$(curl --write-out %{http_code} --silent --output /dev/null http://localhost:8888 2>/dev/null)"
+        if [[ $result -eq "200" ]]; then
+            end_ts=$(date +%s)
+            echo "App available after $((end_ts - start_ts)) seconds"
+            break
+        fi
+        sleep 1
+        echo "...still waiting"
+    done
+    return $result
+}
+
+docker run -d -p 8888:8888 $DOCKER_COMMIT_TAG
+
+# The variable expansion below is 60s by default, or the argument provided
+# to this script
+TIMEOUT="${1:-60}"
+wait_for
+RESULT=$?
+if [[ $RESULT -ne 200 ]]; then
+  echo "App did not become available in time"
+  exit 1
+fi
+exit 0