feat: add npm install tool (#40)

Dockerfile.bionic

@@ -61,6 +61,8 @@ RUN install-tool node 14.16.1
 RUN install-tool pnpm 6.0.2
 # renovate: datasource=npm
 RUN install-tool yarn 1.22.10
+# renovate: datasource=npm
+RUN install-npm lerna 3.22.1
 
 # renovate: datasource=github-releases lookupName=containerbase/php-prebuild
 RUN install-tool php 8.0.6

src/usr/local/bin/install-npm

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+
+. /usr/local/buildpack/util.sh
+
+require_root
+require_tool "$@"
+check_command npm
+
+echo "Installing npm tool ${TOOL_NAME} v${TOOL_VERSION}"
+npm install --global ${TOOL_NAME}@${TOOL_VERSION}
+
+# Clean download cache
+npm cache clean --force

test/node/Dockerfile

@@ -60,6 +60,9 @@ USER root
 # renovate: datasource=npm
 RUN install-tool yarn 1.22.10
 
+# renovate: datasource=npm
+RUN install-npm lerna 3.22.1
+
 USER 1000
 
 RUN set -ex; \