Merge docker-compose configuration into master

esap/docker/shared/Dockerfile

+FROM nginx
+RUN apt-get update && apt-get install --no-install-recommends -y bash nano mc
+RUN rm /etc/nginx/conf.d/default.conf
+COPY esap_nginx.conf /etc/nginx/conf.d/
+ 
+# put Dockerfile, esap_nginx.conf and oidc in your $HOME/shared directory
+# where the docker-compose.yml can find it.