Issue with login when running from inside of a devcontainer

[han-so1omon]

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Example Code

{
	// devcontainer.json
        "name": "Candid dev container",
	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
	"image": "mcr.microsoft.com/devcontainers/base:bookworm",
    //"build": {
    //    "dockerfile": "Dockerfile"
    //},

	"features": {
		"ghcr.io/devcontainers/features/docker-in-docker:2": {
			"version": "latest",
			"enableNonRootDocker": "true",
			"moby": "true"
		},
		"ghcr.io/devcontainers/features/python:1": {
			"installTools": true,
			"version": "3.11"
		},
		"ghcr.io/devcontainers-contrib/features/poetry:2": {
			"version": "latest"
		},
        "ghcr.io/devcontainers-contrib/features/fzf:1": {
            "version": "latest"
        },
		"ghcr.io/devcontainers/features/node:1": {
			"version": "lts",
			"nvmVersion": "latest"
		}
	},

	// Use 'forwardPorts' to make a list of ports inside the container available locally.
	"forwardPorts": ["80:64300", "5173:5173", "5432:5433", "8080:8081", "8090:8091"]

	// Use 'postCreateCommand' to run commands after the container is created.
	//"postCreateCommand": "sh -c 'echo \"127.0.0.1 local.candid.tips\" >> /etc/hosts && eval \"$(fzf --bash)\"'",

	// Configure tool-specific properties.
	// "customizations": {},

	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
	//"remoteUser": "root"
}


On host:

sudo echo "127.0.0.1 local.myhost

```sh
# .env file
# Domain
# This would be set to the production domain with an env var on deployment
DOMAIN=local.myhost

# Environment: local, staging, production
ENVIRONMENT=local

PROJECT_NAME="My Project"
STACK_NAME=myproject

# Backend
BACKEND_CORS_ORIGINS="http://localhost,http://localhost:5173,https://localhost,https://localhost:5173,http://localhost.tiangolo.com,http://local.myhost"
SECRET_KEY=foo 
[email protected]
FIRST_SUPERUSER_PASSWORD=foo
USERS_OPEN_REGISTRATION=False

# Emails
SMTP_HOST=
SMTP_USER=
SMTP_PASSWORD=
[email protected]
SMTP_TLS=True
SMTP_SSL=False
SMTP_PORT=587

# Postgres
POSTGRES_SERVER=localhost
POSTGRES_PORT=5432
POSTGRES_DB=app
POSTGRES_USER=postgres
POSTGRES_PASSWORD=foo
SENTRY_DSN=

# Configure these with your own Docker registry images
DOCKER_IMAGE_BACKEND=me/my-backend
DOCKER_IMAGE_FRONTEND=me/my-frontend

Description

I am running this from a devcontainer. My devcontainer is setup using the file shown in the Example Code section. It is running Docker-in-Docker, from the standard microsoft devcontainer base, with features for Python, Node, and Docker-in-Docker. My .env file for docker compose is shown in the Example Code section as well

When I run from my host OS (Mac OS), I can run docker compose up, then login as expected. When I run from my devcontainer, I get a CORS error upon trying to login. I can access /login, /docs, /redoc, the adminer page (incl logging in), and the traefik page with no issue. I have also disabled CORS and done a test on the /api/v1/login/access-token url with the first_superuser name and password, and this works correctly. When I try to login via the /login page, though, even with CORS allow all origins, it yields the following in the browser:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://local.myhost/api/v1/login/access-token. (Reason: CORS request did not succeed). Status code: (null).

I have a suspicion that this has to do with the local.myhost name not being resolved correctly from within the devcontainer or docker compose environment, but I'm not sure. Does anyone have an idea of what is the issue?

Operating System

macOS

Operating System Details

Host: MacOS 14.3.1
Devcontainer: mcr.microsoft.com/devcontainers/base:bookworm with Docker in Docker, Python 3.11, Poetry, and Node

Python Version

3.11

Additional Context

No response