Add build test

ci/build-test.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# build-test.bash -- Make sure the build worked.
+# This is to make sure we don't have Node version errors or any other
+# compilation-related errors.
+
+set -euo pipefail
+
+function main() {
+  cd "$(dirname "${0}")/.." || exit 1
+
+  local output
+  output=$(node ./build/out/node/entry.js --list-extensions 2>&1)
+  if echo "$output" | grep 'was compiled against a different Node.js version'; then
+    echo "$output"
+    exit 1
+  else
+    echo "Build ran successfully"
+  fi
+}
+
+main "$@"