ConnectionError: getaddrinfo ENOTFOUND postgres

Hi @Matthew_White !,
I'm use the last version ( master branch the last Friday the tag version is v1.3.3 ) and the docker-compose version is version: "3" . Maybe i'm worng but is the last version.
About the database configuration i'm guss is correct

    "database": {
      "host": "postgresqldb", # this is an alias, but in my / etc / hosts there is the name of the map's IP address and I also put the ip address directly in the file.
      "user": "odkuser",
      "password": "odkpass",
      "database": "odkpass"
    }
...

When you said
"Are you specifying a port? If so, that should be done by adding a separate port configuration." ,you are referring to add another tag with the port or add the port in the host key

    "database": {
      "host": "postgresqldb", # this is an alias, but in my / etc / hosts there is the name of the map's IP address and I also put the ip address directly in the file.
      "user": "odkuser",
      "password": "odkpass",
      "database": "odkpass",
     "port":5432
    }
...
or
    "database": {
      "host": "postgresqldb:5432", # this is an alias, but in my / etc / hosts there is the name of the map's IP address and I also put the ip address directly in the file.
      "user": "odkuser",
      "password": "odkpass",
      "database": "odkpass"
    }
...

Thanks alot