feat: add docker image to build binaries used in tests

protocol-testing/entrypoint.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+if [ "$#" -lt 1 ]; then
+  echo "Usage: $0 test1 [test2 ...]"
+  exit 1
+fi
+
+for test in "$@"; do
+  echo "Running test: /app/substreams/$test"
+  tycho-protocol-sdk --package-path "/app/substreams/$test" --db-url "$DATABASE_URL"
+done