Attempting to get docker setup properly; Notifications colour consistency

Dockerfile

@@ -1,42 +1,34 @@
 FROM debian:stretch-slim
 
-# Copy the current codebase
-COPY . /iris
-
 RUN set -ex \
     # Official Mopidy install for Debian/Ubuntu along with some extensions
     # (see https://docs.mopidy.com/en/latest/installation/debian/ )
  && apt-get update \
  && DEBIAN_FRONTEND=noninteractive apt-get install -y \
-        curl \
-        dumb-init \
-        gcc \
-        gnupg \
-        gstreamer1.0-alsa \
-        gstreamer1.0-plugins-bad \
-        python-crypto \
+       curl \
+       dumb-init \
+       gcc \
+       gnupg \
+       gstreamer1.0-alsa \
+       gstreamer1.0-plugins-bad \
+       python-crypto \
+       python-pykka \
  && curl -L https://apt.mopidy.com/mopidy.gpg | apt-key add - \
  && curl -L https://apt.mopidy.com/mopidy.list -o /etc/apt/sources.list.d/mopidy.list \
  && apt-get update \
  && DEBIAN_FRONTEND=noninteractive apt-get install -y \
-        mopidy \
-        mopidy-soundcloud \
-        mopidy-spotify \
+       mopidy \
+       mopidy-soundcloud \
+       mopidy-spotify \
  && curl -L https://bootstrap.pypa.io/get-pip.py | python - \
  && pip install -U six pyasn1 requests[security] cryptography \
  && pip install \
-        Mopidy-Local-Images \
-        Mopidy-Local-SQLite \
-        Mopidy-GMusic \
-        pyopenssl \
-        youtube-dl \
- # Clone Iris from current directory and install in development mode.
- # This allows a binding at "/iris" to map to your local folder for development.
- && cd /iris \
- && python setup.py develop \
- && cd / \
- && mkdir -p /var/lib/mopidy/.config \
- && ln -s /config /var/lib/mopidy/.config/mopidy \
+       Mopidy-Local-Images \
+       Mopidy-Local-SQLite \
+       Mopidy-GMusic \
+       pyopenssl \
+       youtube-dl \
+       mopidy-iris \
 # Install Snapcast
 # This is the most reliable way to get audio out of a Docker instance.
  && curl -L https://github.com/badaix/snapcast/releases/download/v0.15.0/snapserver_0.15.0_amd64.deb -o snapserver.deb \