Allow to set up multiple DBs per environment variables

[marton78]

Original issue by @evleite from here:

It would be great to configure more than one db on the same container and it could be used on docker compose file like this:

docker run --name postgres -d
-e 'POSTGRES_USER=jira'
-e 'POSTGRES_PASSWORD=jellyfish'
-e 'POSTGRES_DB1=jiradb'
-e 'POSTGRES_ENCODING1=UNICODE'
-e 'POSTGRES_COLLATE1=C'
-e 'POSTGRES_COLLATE_TYPE1=C'
-e 'POSTGRES_DB2=confluencedb'
-e 'POSTGRES_ENCODING2=UNICODE'
-e 'POSTGRES_COLLATE2=C'
-e 'POSTGRES_COLLATE_TYPE2=C'
-e 'POSTGRES_DB3=bitbucketdb'
-e 'POSTGRES_ENCODING3=UNICODE'
-e 'POSTGRES_COLLATE3=C'
-e 'POSTGRES_COLLATE_TYPE3=C'
blacklabelops/postgres

This way we can have one single db server/container.

[blacklabelops]

I have closed that issue because it belongs on my postgres repository, not on my jira repository. The postgres image rework is still in the making.

[marton78]

Yeah I know, you asked the original author to file an issue here, but he seems to have forgotten. So I did it.

[blacklabelops]

Yeah now I see. Absolutely correct and many thanks!