refactor: rename doc to docs

docs/npm.md

@@ -0,0 +1,58 @@
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+# npm Install Requirements
+
+- [Ubuntu, Debian](#ubuntu-debian)
+- [Fedora, CentOS, RHEL](#fedora-centos-rhel)
+- [Alpine](#alpine)
+- [macOS](#macos)
+- [FreeBSD](#freebsd)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+If you're installing the npm module you'll need certain dependencies to build
+the native modules used by VS Code.
+
+You also need at least node v12 installed. See [#1633](https://github.com/cdr/code-server/issues/1633).
+
+## Ubuntu, Debian
+
+```bash
+sudo apt-get install -y \
+  build-essential \
+  pkg-config \
+  libx11-dev \
+  libxkbfile-dev \
+  libsecret-1-dev \
+  python3
+npm config set python python3
+```
+
+## Fedora, CentOS, RHEL
+
+```bash
+sudo yum groupinstall -y 'Development Tools'
+sudo yum config-manager --set-enabled PowerTools # unnecessary on CentOS 7
+sudo yum install -y python2 libsecret-devel libX11-devel libxkbfile-devel
+npm config set python python2
+```
+
+## Alpine
+
+```bash
+apk add alpine-sdk bash libstdc++ libc6-compat libx11-dev libxkbfile-dev libsecret-dev
+npm config set python python3
+```
+
+## macOS
+
+```bash
+xcode-select --install
+```
+
+## FreeBSD
+
+```sh
+pkg install -y git python npm-node12 yarn-node12 pkgconf
+pkg install -y libsecret libxkbfile libx11 libinotify
+```