Initial Docker deployment setup

docker/entrypoint.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+# Start a compiled program.
+set -eu
+
+if [ "${1:-}" = "drivershub" ]; then
+    shift
+    exec /app/drivershub "$@"
+fi
+
+if [ "${1:-}" = "bannergen" ]; then
+    shift
+    exec /app/bannergen "$@"
+fi
+
+exec "$@"