be more quiet

Dockerfile.debian-8

@@ -1,7 +1,7 @@
 FROM debian:8
 
-RUN apt-get update \
-    && apt-get install -yq --no-install-recommends \
+RUN apt-get -q update \
+    && apt-get -yq install --no-install-recommends \
       build-essential \
       libffi-dev \
       libssl-dev \
@@ -9,7 +9,8 @@ RUN apt-get update \
       python-dev \
       python-pip \
     && apt-get autoclean \
-    && pip install --upgrade ansible
+    && pip install --quiet --upgrade \
+      ansible
 
 WORKDIR /site