Mattermost-server: Make docker-compose services optional and configurable

[mattermod]

Some services defined in docker-compose.yml are not required to setup/run the development environment. Ideally, we could disable them using some sort of configuration.

Examples:

• elasticsearch - If not using Elasticsearch features
• inbucket - If not using email features
• openldap - If not using LDAP features
• mysql/postgres - Enabling only the database type you are using

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JIRA: https://mattermost.atlassian.net/browse/MM-22633

[BukkyOmo]

Hello @mattermod, I would like to work on this task, could you assign it to me?

[hanzei]

Thanks for taking a shot @BukkyOmo :+1:

[BukkyOmo]

@hanzei Thanks. On it

[hanzei]

Hey @BukkyOmo

I just wanted to check if you are still working on this ticket

[RajatVaryani]

@hanzei I will like to work on it. @BukkyOmo Are you still working?

[hanzei]

I think it's save to assume that @BukkyOmo is not longer working on this ticket. Assigning it to you @RajatVaryani

[mickmister]

Hi @RajatVaryani how's it going? Do you have any questions on this ticket?

[agnivade]

I think this is already done by @jespino.

[jespino]

Yes, this is doing, I going to close it.