adding the rest of the files

Dockerfile

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+FROM debian:stretch-slim
+MAINTAINER Adam Harrison-Fuller <adam@adamhf.io>
+
+RUN apt-get update && \
+    apt-get install -y mumble-server && \
+    rm -rf \
+    /var/cache/apt/* \
+    /var/lib/apt/lists/*
+
+EXPOSE 64738 64738/udp
+
+ADD ./data/mumble_server.ini /config/
+VOLUME /data
+ENV MUMBLE_INI /config/mumble_server.ini
+
+ADD entrypoint.sh /
+RUN chmod +x entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["-fg"]

data/mumble_server.ini

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+icesecretwrite=
+database=/data/murmur.sqlite
+logfile=/data/mumble-server.log
+pidfile=/data/mumble-server.pid
+welcometext="Welcome to Mumble"
+port=64738
+serverpassword=
+bandwidth=72000
+users=100
+uname=mumble-server
+[Ice]
+Ice.Warn.UnknownProperties=1
+Ice.MessageSizeMax=65536

entrypoint.sh

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+#!/bin/bash
+    
+# set volume permissions
+if [ "$(stat -c %U /data)" != "mumble-server" ] ; then 
+  # SQLLite needs to be created by mumble-server / UID 106
+  echo "mumble-server does not own /data, attempting to modify";
+  chown -R mumble-server.mumble-server /data
+fi; 
+
+OPTS="-ini $MUMBLE_INI"
+
+exec murmurd $OPTS $@

fig.yml

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+mumble:
+  build: .
+  ports:
+    - "64739:64738"
+    - "64739:64738/udp"
+  volumes:
+    - data/:/data/