qrgen: add script to check if qrgen deployment works

verifier/README.md

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+
+Script and Containerfile for deployment verification
+
+

verifier/qrverify.sh

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+#!/bin/bash
+#
+# EP should contain the hostname?
+# If passing it is impossible, maybe we should interrogate Ingress resource?
+#
+# uuidgen comes from util-linux, zbarimg from zbar
+
+set -e
+
+DATA=$(uuidgen)
+TMPFILE=$(mktemp --suffix .png)
+
+echo "➡️  Checking ${EP} with data: ${DATA}"
+
+curl --verbose "http://${EP}/render/?data=${DATA}" --output ${TMPFILE}
+
+DECODED=$(zbarimg --quiet ${TMPFILE})
+
+if [ "QR-Code:${DATA}" != "${DECODED}" ]; then
+	echo "❌ Error, got ${DECODED}"
+	exit 1
+else
+	echo "✅ OK!"
+fi
+
+exit 0
+
+