improves documentation for composer

README.md

@@ -2,12 +2,24 @@
 ## ter.typo3.org
 
 ### Prerequisites
-Make sure to have an instance of [jwilder/nginx-proxy](https://github.com/jwilder/nginx-proxy) running locally.
+[docker engine](https://docs.docker.com/engine/installation/)
+Make sure to have an instance of [jwilder/nginx-proxy](https://github.com/jwilder/nginx-proxy) running on your development box.
 An easy way to get it up and running is using [torvitas/nginx-proxy-configuration](https://github.com/torvitas/docker-nginx-proxy-configuration).
 
 ### Quickstart
-```
+`
 git clone https://git-t3o.typo3.org/t3o/ter.git
 make init up log
-```
+`
 ... and finally [click here](https://ter.typo3.127.0.0.1.xip.io)
+
+### Composer
+Example:
+`
+./data/scripts/composer.sh --working-dir=data/typo3/ info
+`
+For your convenience there are the following make jobs:
+`
+make composer-install
+make composer-update
+`

data/scripts/composer.sh

@@ -10,15 +10,20 @@
 #
 # You can add additional volumes (or any docker run options) using
 # the $COMPOSER_OPTIONS environment variable.
-#
+COMPOSER_OPTIONS=${COMPOSER_OPTIONS:-}
+
+# You can set the composer cache directory using the $COMPOSER_CACHE
+# environment variable.
+COMPOSER_CACHE=${COMPOSER_CACHE:-/tmp/composer}
 
+# You can set the ssh key to be used using the $SSH_IDENTITY_FILE
+# environment variable.
+SSH_IDENTITY_FILE=${SSH_IDENTITY_FILE:-~/.ssh/id_rsa}
 
 set -e
 
 VERSION="1.2-alpine"
 IMAGE="composer/composer:$VERSION"
-SSH_IDENTITY_FILE=${SSH_IDENTITY_FILE:-~/.ssh/id_rsa}
-COMPOSER_CACHE=${COMPOSER_CACHE:-/tmp/composer}
 
 # Setup volume mounts for composer config, context and ssh keys
 if [ "$(pwd)" != '/' ]; then