Only adjust configs if none rolled in.

opensim/Dockerfile

@@ -5,17 +5,16 @@ LABEL org.opencontainers.image.authors="code@soupbowl.io"
 LABEL org.opencontainers.image.source="https://github.com/soup-bowl/opensimulator-docker"
 LABEL org.opencontainers.image.licenses="MIT"
 
-RUN curl -o /bin/wait-for-it https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh \
-    && chmod +x /bin/wait-for-it
-
 RUN apt-get update && apt-get install -y screen
 
-RUN mkdir /opt/opensim-tmp && curl http://opensimulator.org/dist/opensim-0.9.2.1.tar.gz | tar xzf - -C /opt/opensim-tmp
-RUN mkdir /opt/opensim && mv /opt/opensim-tmp/opensim*/* /opt/opensim
+RUN mkdir /opt/opensim-tmp \
+    && curl http://opensimulator.org/dist/opensim-0.9.2.1.tar.gz | tar xzf - -C /opt/opensim-tmp \
+    && rm /opt/opensim-tmp/opensim*/bin/OpenSim.ini \
+    && rm /opt/opensim-tmp/opensim*/bin/config-include/StandaloneCommon.ini \
+    && mkdir /opt/opensim \
+    && mv /opt/opensim-tmp/opensim*/* /opt/opensim
 
-COPY Regions.ini          /opt/opensim/bin/Regions/Regions.ini
-COPY OpenSim.ini          /opt/opensim/bin/OpenSim.ini
-COPY StandaloneCommon.ini /opt/opensim/bin/config-include/StandaloneCommon.ini
+COPY defaults  /opt/opensim/bin/defaults
 
 EXPOSE 9000
 
@@ -24,4 +23,4 @@ WORKDIR /opt/opensim/bin
 COPY docker-entrypoint.sh /usr/local/bin/
 
 ENTRYPOINT ["docker-entrypoint.sh"]
-CMD [ "mono",  "./OpenSim.exe" ]
+CMD [ "mono", "./OpenSim.exe" ]

opensim/docker-entrypoint.sh

@@ -1,4 +1,21 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
 
+chown -R $(id -u):$(id -g) defaults
+
+if [ ! -e OpenSim.ini ]; then
+	echo >&2 "INFO: No OpenSim configuration found, pulling one together."
+	cp defaults/OpenSim.ini OpenSim.ini
+fi
+
+if [ ! -e config-include/StandaloneCommon.ini ]; then
+	echo >&2 "INFO: No Grid Common configuration found, pulling one together."
+	cp defaults/StandaloneCommon.ini config-include/StandaloneCommon.ini
+fi
+
+if [ `find Regions -maxdepth 1 -name '*.ini' | wc -l` -eq 0 ]; then
+	echo >&2 "INFO: No region details found, pulling one together."
+	cp defaults/Regions.ini Regions/Regions.ini
+fi 
+
 exec "$@"