Create JIRA_DB_PASSWORD_FILE variable like POSTGRES_PASSWORD_FILE does

[d2a-raudenaerde]

Prerequisites

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Description

Using docker-compose leaks the DB password; postgres has an option for this (POSTGRES_PASSWORD_FILE). It can be used with secrets like this:

  - POSTGRES_PASSWORD_FILE=/run/secrets/postgres-jira-passwd

Please create a similar JIRA_DB_PASSWORD_FILE option.