Add haskell helper script

test/tests/run-haskell-in-container.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+set -e
+
+dir="$(readlink -f "$(dirname "$BASH_SOURCE")")"
+
+inContainerPath="/tmp/haskell"
+cmd=( "$inContainerPath/container.rb" )
+
+docker run --rm -v "$dir":"$inContainerPath":ro -w "$inContainerPath" --entrypoint runhaskell "$1" "${cmd[@]}"