Fresh Phoenix / Postgres project. DBConncetionError. Works fine on Render?

Question

Hello, I'm trying out Railway after nearly two years to see what it's like. I'm seeing an error trying to run my brand new Phoenix project.

```
** (DBConnection.ConnectionError) connection not available and request was dropped from queue after 2987ms. This means requests are coming in and your connection pool cannot serve them fast enough. You can address this by:

1. Ensuring your database is available and that you can connect to it

2. Tracking down slow queries and making sure they are running fast enough

3. Increasing the pool_size (although this increases resource consumption)

4. Allowing requests to wait longer by increasing :queue_target and :queue_interval

See DBConnection.start_link/2 for more information

(ecto_sql 3.11.1) lib/ecto/adapters/sql.ex:1054: Ecto.Adapters.SQL.raise_sql_call_error/1

(elixir 1.16.2) lib/enum.ex:1700: Enum."-map/2-lists^map/1-1-"/2

(ecto_sql 3.11.1) lib/ecto/adapters/sql.ex:1161: Ecto.Adapters.SQL.execute_ddl/4

(ecto_sql 3.11.1) lib/ecto/migrator.ex:755: Ecto.Migrator.verbose_schema_migration/3

(ecto_sql 3.11.1) lib/ecto/migrator.ex:563: Ecto.Migrator.lock_for_migrations/4

(ecto_sql 3.11.1) lib/ecto/migrator.ex:432: Ecto.Migrator.run/4

(ecto_sql 3.11.1) lib/ecto/migrator.ex:170: Ecto.Migrator.with_repo/3
```

This same Dockerfile works fine on Render. Any ideas why this is happening? Project id is: `429a2255-e11f-4860-acd2-0d61fae16250`