Update the test docker images to contain oragono instead of charybdis

docker/test/alpine/Dockerfile

@@ -0,0 +1,35 @@
+# This Dockerfile creates a docker image suitable to run biboumi’s build and
+# tests.  For example, it can be used on with gitlab-ci.
+
+FROM docker.io/alpine:latest
+
+ENV LC_ALL C.UTF-8
+
+# Needed to build biboumi
+RUN apk add --no-cache \
+git \
+make \
+cmake \
+g++ \
+libuuid \
+udns-dev \
+expat-dev \
+libidn-dev \
+sqlite-dev \
+botan-dev \
+util-linux-dev \
+libgcrypt-dev \
+postgresql-dev \
+valgrind \
+py3-pip \
+py3-lxml \
+python3-dev \
+libffi-dev \
+go \
+wget
+
+# Install oragono, for e2e tests
+RUN wget "https://github.com/oragono/oragono/archive/v2.0.0.tar.gz" && tar xvf "v2.0.0.tar.gz" && cd "oragono-2.0.0" && make && cp ~/go/bin/oragono /usr/local/bin
+
+# Install slixmpp, for e2e tests
+RUN git clone https://github.com/saghul/aiodns.git && cd aiodns && git checkout 7ee13f9bea25784322~ && python3 setup.py build && python3 setup.py install && git clone git://git.louiz.org/slixmpp && pip3 install pyasn1 && cd slixmpp && python3 setup.py build && python3 setup.py install