updated Dockerfile

Dockerfile

@@ -10,11 +10,10 @@ ENV DOCKER_COMPOSE_VERSION 1.23.2
 
 # Install docker-cli, docker-compose, git, bash
 RUN apk update && \
-    apk add --no-cache docker-cli
+    apk add --no-cache docker-cli bash git
 
 RUN apk --update add py-pip &&\
-    pip install -U docker-compose==${DOCKER_COMPOSE_VERSION} &&\
+    pip install -U docker-compose==${DOCKER_COMPOSE_VERSION}
-    rm -rf `find / -regex '.*\.py[co]' -or -name apk`
 
 RUN set -o errexit -o nounset && echo "Installing build dependencies" && \
     apk add --no-cache --virtual .build-deps gnupg &&  \