further cleanup

update docs and tests

install/20-nvm.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+#
+# After running this script:
+#   1. nvm is installed
+#
+
+# 1. nvm is installed
+if not_installed "nvm"; then
+
+    printf "Installing nvm...\n"
+
+    # Install nvm
+    curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.2/install.sh | bash
+    refresh
+
+fi
+printf "nvm is installed, upgrading...\n"
+git --git-dir="$NVM_DIR/.git" pull
+nvm update --lts node
+nvm update node
+nvm update npm
+nvm --version
+node --version
+npm --version