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+# Deployment of certificates: (in case of update)
+
+This folder is prepared with a set of keys matching DfC for test purposes.
+
+Copy from datafile-app-server/config/keys to the ./tls/ the following files:
+
+- dfc.crt
+- ftp.crt
+- ftp.key
+
+# Docker preparations
+
+Source: <https://docs.docker.com/install/linux/linux-postinstall/>
+
+`sudo usermod -aG docker $USER`
+
+then logout-login to activate it.
+
+# Prepare files for the simulator
+
+Run `prepare.sh` with an argument found in `test_cases.yml` (or add a new tc in that file) to create files (1MB, 5MB and 50MB files) and a large number of 
+symbolic links to these files to simulate PM files. The files names maches the files in
+the events produced by the MR simulator. The dirs with the files will be mounted
+by the ftp containers, defined in the docker-compse file, when started
+
+# Starting/stopping the FTPES/SFTP server(s)
+
+Start: `docker-compose up`
+
+Stop: Ctrl +C, then `docker-compose down`  or `docker-compose down --remove-orphans`
+
+If you experience issues (or port collision), check the currently running other containers
+by using 'docker ps' and stop them if necessary.
+
+# Cleaning docker structure
+
+Deep cleaning: `docker system prune`