updated Dockerfile

Dockerfile

@@ -10,7 +10,7 @@ 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}