Add aliases and scripts for ahoy, composer, docker-compose and drush

Dockerfile

@@ -2,7 +2,7 @@ FROM alpine:3.7
 
 LABEL com.example.vendor="LakeDrops" \
       maintainer="juergen.haas@lakedrops.com" \
-      version="1.2.0" \
+      version="1.2.1" \
       description="An image for GitLab runner to build and test Drupal projects."
 
 ARG compose_version=1.21.2
@@ -95,4 +95,11 @@ RUN mkdir -p /root/.ssh && \
     cd .. && \
     rm -rf git-extras && \
     \
-    composer global require "hirak/prestissimo:^0.3"
+    composer global require "hirak/prestissimo:^0.3" && \
+    \
+    ln -s /usr/local/bin/ahoy /usr/local/bin/a && \
+    ln -s /usr/local/bin/composer /usr/local/bin/c && \
+    ln -s /usr/local/bin/docker-compose /usr/local/bin/d-c && \
+    \
+
+COPY drush.sh /usr/local/bin/drush

drush.sh

+#!/bin/sh
+
+docker-compose exec --user root php drush $@