readd haproxy

this readds haproxy as a dependency. this way you can pass
`--with-haproxy` as a flag again and expose couchdb on 5984

closes #78

2.0-dev/Dockerfile

@@ -20,6 +20,7 @@ RUN groupadd -r couchdb && useradd -d /opt/couchdb -g couchdb couchdb
 RUN apt-get update -y && apt-get install -y --no-install-recommends \
  ca-certificates \
  curl \
+ haproxy \
  erlang-nox \
  erlang-reltool \
  libicu52 \

2.0.0-rc1-vote/Dockerfile

@@ -20,6 +20,7 @@ RUN groupadd -r couchdb && useradd -d /opt/couchdb -g couchdb couchdb
 RUN apt-get update -y && apt-get install -y --no-install-recommends \
  ca-certificates \
  curl \
+ haproxy \
  erlang-nox \
  erlang-reltool \
  libicu52 \

2.0.0/Dockerfile

@@ -20,6 +20,7 @@ RUN groupadd -r couchdb && useradd -d /opt/couchdb -g couchdb couchdb
 RUN apt-get update -y && apt-get install -y --no-install-recommends \
  ca-certificates \
  curl \
+ haproxy \
  erlang-nox \
  erlang-reltool \
  libicu52 \