adds a README and generify get.

README.md

+# C.I. Wrappers
+
+A sets a utility bash functions for Continuous Integration C.I.
+
+## Installation
+
+Install with :
+
+```bash
+curl -s https://bruno.univ-tln.fr/get-ci-wrapper.sh | bash
+```
+
+To use it in the current shell :
+
+```bash
+source ~/.ci-wrappers/ci-wrappers.sh
+```
+
+You can add it to .bashrc or .zshrc :
+
+```bash
+export CI_WRAPPER_HOME=${HOME}/.ci-wrappers
+[[ -f "${CI_WRAPPER_HOME}/ci-wrappers.sh" ]] && \
+  source "${CI_WRAPPER_HOME}/ci-wrappers.sh"
+```
+
+## Usage
+
+- `install-ci-software` <br/>
+  Installs GitHub CLI, Docker client, docker compose plugin, vagrant and terraform in $CI_WRAPPERS_HOME
+- `new-java-project testci fr.univtln.bruno.tests` <br/>
+  Creates a new maven projects ready for C.I.
+- `docker-mvn` <br/>
+  Wraps maven in a container (docker needed see beelow).<br/>
+  For example to build a C.I. project: `docker-mvn clean verify`
+- `github-runner-repo` or `github-runner-org` <br/>
+  Creates and register a new GitHub runner in a docker container for the current repository
+  or the organisation (account).
+- A docker engine with http proxy support in VM :
+    - `docker-vagrant` is a wrapper for a specific Docker vagrant Box (Docker in a VBox VM).
+        - `docker-vagrant up` and `docker-vagrant halt` to create/start and stop the vm.
+        - `docker-vagrant ssh` to log in the VM.
+        - `docker-vagrant suspend`, `docker-vagrant resume` and `docker-vagrant status` to suspend, resume and get VM
+          status.
+        - `docker-vagrant destroy` to destroy it (**docker named volumes will be lost**).
+    - `use-vagrant-docker` to sets docker client to used in the current shell (sets $DOCKER_HOST).
+    - `vagrant destroy` to destroy it.

get-ci-wrapper.sh

 #!/usr/bin/env bash
 
+CI_WRAPPERS_HOME="\${CI_WRAPPERS_HOME:-\${HOME}/.ci-wrappers}"
+
 _create_config() (
-  echo HOME: "${HOME}"
   # Create or update default config file
-  mkdir -p "${HOME}/.ci-wrappers/"
-  cat >"${HOME}/.ci-wrappers/config" <<END
+  mkdir -p "${CI_WRAPPERS_HOME}"
+  cat >"${CI_WRAPPERS_HOME}/config" <<END
 CI_VAGRANT_VERSION=2.3.4
 CI_TERRAFORM_VERSION=1.3.6
 CI_DOCKER_CLIENT_VERSION=20.10.19
@@ -25,7 +26,7 @@ END
 _create_config
 
 # Load the config
-source "${HOME}/.ci-wrappers/config"
+source "${CI_WRAPPERS_HOME}/config"
 
 # Installs the script locally
 curl -s https://raw.githubusercontent.com/ebpro/ciwrappers/develop/ci-wrappers.sh > "$CI_WRAPPERS_HOME"/ci-wrappers.sh