Set an explicit username and password for the db service

[azlyth]

Issue that this addresses

The official Postgres image pushed a change that will prevent a fresh database from initializing without a password.

Trying to start with an empty db volume results in this error from the db container:

db        | Error: Database is uninitialized and superuser password is not specified.
db        |        You must specify POSTGRES_PASSWORD for the superuser. Use
db        |        "-e POSTGRES_PASSWORD=password" to set it in "docker run".
db        |
db        |        You may also use POSTGRES_HOST_AUTH_METHOD=trust to allow all connections
db        |        without a password. This is *not* recommended. See PostgreSQL
db        |        documentation about "trust":
db        |        https://www.postgresql.org/docs/current/auth-trust.html

Solution

• Explicitly set the default Postgres username and password to postgres via environment.
• Set the new Postgres password in each service's configuration.

[BretFisher]

LGTM, but didn't test.

[mikesir87]

Just tested it and it works for me. Only suggestion would be to update the other docker-compose-* files so they still work too.

[mikesir87]

Ah! Should have included the docker-swarm-* files too. After that, should be ready to merge.

[mikesir87]

Alrighty. LGTM. Feel free to merge @jrburcio 👍

[sparrowt]

These changes seem to have broken the 'Getting Started' instructions such that step 4 (swarm) of this guide no longer works:
https://www.docker.com/docker-desktop/getting-started-for-windows

This is quite off-putting for potential new folks trying out Docker, @azlyth is there any chance you or someone else with permission could update the images? (which is apparently what needs doing according to this comment) in order to address #165 and #162?

Many thanks in advance

[azlyth]

Hey @sparrowt, I unfortunately don't have the access to do that. Perhaps someone on the Docker team can look into fixing?