* correctly pass secrets to workspace-containers

* update README
* helper-scripts with create symlinks helper and get composer auth github token helper

get-composer-auth.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+FILE=${HOME}/.composer/auth.json
+
+if [[ -f "${FILE}" ]]; then
+  if [[ ! -z "$(cat $FILE | grep github)" ]]; then
+    exit 0
+  fi
+fi
+
+echo "Get token: https://github.com/settings/tokens/new?scopes=repo&description=Composer"
+
+# user="USER INPUT"
+read -p "Enter token: " TOKEN
+
+composer config -g github-oauth.github.com ${TOKEN}