Lemmy on Docker - Postgre Authentication Fail - waveform.social

I’m trying to get Lemmy up and running on an Ubuntu 22.04 host. I’ve followed this guide [https://join-lemmy.org/docs/administration/install_docker.html] supplemented by googling. I can actually get to the front end, but it gives me “There was an error on the server.” When I dig into the logs, I see this: "thread 'main' panicked at 'Error connecting to postgres://lemmy:<my pg password>@postgres:5432/lemmy: FATAL: password authentication failed for user \"lemmy\"\n","stream":"stderr","time":"2023-06-26T03:14:17.47460915Z"} The only thing I can find about this error related to Lemmy is this thread [https://github.com/LemmyNet/lemmy/issues/897], which indicates that the password was not defined in the docker-compose.yml file prior to starting the containers. I have since redone the configuration three times, each time deleting the volumes folder and double-checking that my postgre password is correct both in docker-compose.yml and lemmy.hjson. Any ideas what might be the problem? Thank you kindly for any help you can provide!