Adapt for Ubuntu and prepare for migration to Hetzner

roles/murmur-docker/README.md

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-murmur-docker
-=============
-Installs murmur
-
-Dependencies
-------------
-- base-docker

roles/murmur-docker/meta/main.yml

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-dependencies:
-  - base-docker

roles/murmur-docker/tasks/main.yml

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 - name: Copy murmur config
   copy: src=murmur dest={{docker_compose_files_folder}}
 - name: Create murmur data folder
-  file: dest={{docker_compose_persistence_folder}}/murmur state=directory
+  file: dest=/var/lib/murmur state=directory
 - name: Copy murmur database
   copy: src=/backups/murmur/murmur.sqlite dest=/var/lib/murmur/ force=no remote_src=yes
 - name: Start murmur docker project