docs: add Long Term Support (LTS) README section

Author: MikeMcC399

README.md

@@ -27,6 +27,7 @@ The official Node.js docker image, made with love by the node community.
   - [`node:bookworm`](#nodebookworm)
   - [`node:trixie`](#nodetrixie)
   - [`node:slim`](#nodeslim)
+- [Long Term Support (LTS)](#long-term-support-lts)
 - [Release Availability](#release-availability)
 - [License](#license)
 - [Supported Docker versions](#supported-docker-versions)
@@ -231,6 +232,21 @@ in an environment where *only* the Node.js image will be deployed and you have
 space constraints, we highly recommend using the default image of this
 repository.
 
+## Long Term Support (LTS)
+
+Production applications should only use Active LTS or Maintenance LTS releases.
+
+Refer to [Node.js Releases](https://github.com/nodejs/release#readme) for a description
+of release phases and schedule.
+
+If no version selection is made in a tag, then the Current release is selected.
+`node` images using the Active LTS release are published with an `lts` floating tag
+to aid their selection. `node:lts` can be used on its own, or in combination with other tags
+such as `node:lts-slim`. To select a `node` image based on a Maintenance LTS version
+use the literal node version in the tag.
+
+View the list of currently supported floating and pinned tags on [Docker Hub](https://hub.docker.com/_/node).
+
 ## Release Availability
 
 This repo automatically triggers a process to build new `node` images when Node.js releases