Add local buildkite CI runner

ci/shellcheck.sh

@@ -6,7 +6,7 @@ cd "$(dirname "$0")/.."
 
 set -x
 docker pull koalaman/shellcheck
-find . -name "*.sh" -not -regex ".*/.cargo/.*" -print0 \
+find -E . -name "*.sh" -not -regex ".*/(.cargo|node_modules)/.*" -print0 \
   | xargs -0 \
       docker run -w /work -v "$PWD:/work" \
         koalaman/shellcheck --color=always --external-sources --shell=bash