Install ansible with pip and use version 2.4.3.0

docker/Dockerfile

@@ -1,12 +1,25 @@
 FROM docker:dind
 
 RUN apk add --no-cache \
-	ansible \
-	mktorrent \
-	openssh-client \
-	rsync \
-	squashfs-tools \
-	ca-certificates
+		ca-certificates \
+		libffi \
+		mktorrent \
+		openssh-client \
+		openssl \
+		python2 \
+		rsync \
+		squashfs-tools \
+	&& apk add --no-cache --virtual .build-deps \
+		gcc \
+		libffi-dev \
+		make \
+		musl-dev \
+		openssl-dev \
+		py2-pip \
+		python-dev \
+	&& pip install --upgrade pip \
+	&& pip install ansible==2.4.3.0 \
+	&& apk del .build-deps
 
 ARG PACKER_VERSION