add docker-compose

docker/Dockerfile

@@ -0,0 +1,17 @@
+FROM ubuntu:20.04
+
+# Make sure that the underlying container is patched to the latest versions
+RUN apt-get update && \
+    apt-get install -y wget tar unzip gzip file
+
+# Now install Focalboard as a seperate layer
+RUN wget https://releases.mattermost.com/focalboard/0.5.0/focalboard-server-linux-amd64.tar.gz && \
+    unzip -o focalboard-server-linux-amd64.tar.gz && \
+    tar -xvzf focalboard-server-linux-amd64.tar.gz && \
+    mv focalboard /opt
+
+EXPOSE 8000
+
+WORKDIR /opt/focalboard
+
+CMD /opt/focalboard/bin/focalboard-server