ChronoCCG/Chrono/API/Data/AppDbContextFactory.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;
using Npgsql;

namespace API.Data;

public class AppDbContextFactory : IDesignTimeDbContextFactory<AppDbContext>
{
    public AppDbContext CreateDbContext(string[] args)
    {
        var envPassword = Environment.GetEnvironmentVariable("PostgreSQL_Password")
                          ?? (OperatingSystem.IsWindows()
                              ? Environment.GetEnvironmentVariable("PostgreSQL_Password",
                                  EnvironmentVariableTarget.User)
                              : null)
                          ?? (OperatingSystem.IsWindows()
                              ? Environment.GetEnvironmentVariable("PostgreSQL_Password",
                                  EnvironmentVariableTarget.Machine)
                              : null)
                          ?? Environment.GetEnvironmentVariable("POSTGRESQL_PASSWORD")
                          ?? Environment.GetEnvironmentVariable("POSTGRES_PASSWORD");

        var csb = new NpgsqlConnectionStringBuilder
        {
            Host = "localhost",
            Database = "chrono",
            Username = "postgres",
            Password = envPassword
        };

        var options = new DbContextOptionsBuilder<AppDbContext>()
            .UseNpgsql(csb.ConnectionString)
            .Options;
        return new AppDbContext(options);
    }
}