[ansible] JFrog Platform 7.18.6

Ansible/ansible_collections/jfrog/platform/roles/distribution/README.md

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+# Distribution
+The Distribution role will install distribution software onto the host. An Artifactory server and Postgress database is required.
+
+### Role Variables
+* _distribution_upgrade_only_: Perform an software upgrade only. Default is false.
+
+Additional variables can be found in [defaults/main.yml](./defaults/main.yml).
+## Example Playbook
+```
+---
+- hosts: distribution_servers
+  roles:
+    - distribution
+```
+
+## Upgrades
+The distribution role supports software upgrades. To use a role to perform a software upgrade only, use the _xray_upgrade_only_ variables and specify the version. See the following example.
+
+```
+- hosts: distributionservers
+  vars:
+    distribution_version: "{{ lookup('env', 'distribution_version_upgrade') }}"
+    distribution_upgrade_only: true
+  roles:
+    - distribution
+```