Add http-server for pa11y

Author: mike-potter

Dockerfile

@@ -32,7 +32,7 @@ RUN \
 	# Initialize the user environment (this loads nvm)
 	. $HOME/.profile && \
 	# Install node packages
-	npm install -g [email protected] pa11y@5 pa11y-ci@2
+	npm install -g [email protected] pa11y@5 pa11y-ci@2 http-server
 
 # IMPORTANT! Switching back to the root user as the last instruction.
 USER root

README.md

@@ -2,7 +2,7 @@
 
 > Docker image adding pa11y and other common tools to [Docksal CLI](https://github.com/docksal/service-cli).
 
-[![GitHub tag](https://img.shields.io/github/tag/phase2/docker-cli.svg)](https://github.com/phase2/docker-cli) [![Docker Stars](https://img.shields.io/docker/stars/outrigger/cli.svg)](https://hub.docker.com/r/outrigger/cli) [![Docker Pulls](https://img.shields.io/docker/pulls/outrigger/cli.svg)](https://hub.docker.com/r/outrigger/cli) [![](https://images.microbadger.com/badges/image/outrigger/cli:dev.svg)](https://microbadger.com/images/outrigger/cli:dev "Get your own image badge on microbadger.com")
+[![GitHub tag](https://img.shields.io/github/tag/phase2/docker-cli.svg)](https://github.com/phase2/docker-cli) [![Docker Stars](https://img.shields.io/docker/stars/outrigger/cli.svg)](https://hub.docker.com/r/outrigger/cli) [![Docker Pulls](https://img.shields.io/docker/pulls/outrigger/cli.svg)](https://hub.docker.com/r/outrigger/cli) [![](https://images.microbadger.com/badges/image/outrigger/cli:dev.svg)](https://microbadger.com/images/outrigger/cli:latest "Get your own image badge on microbadger.com")
 
 This Docker image adds the following tools to the docksal/cli image:
 * [pa11y v5](https://github.com/pa11y/pa11y)