chore: add dclint Docker wrapper

dclint.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+set -euo pipefail
+STACKS_DIR="/srv/stacks"
+args=(
+	--rm
+	-t
+	-v "$STACKS_DIR:/app"
+	zavoloklom/dclint
+	.
+	-r
+	--disable-rule services-alphabetical-order
+)
+if [[ "${1:-}" == "--fix" ]]; then
+	args+=(--fix)
+fi
+docker run "${args[@]}"