nexu-io-open-design/deploy

Docker deployment

This deployment ships Open Design as a single Alpine-based runtime image. The daemon serves both the API and the built Next.js static export, so there is no separate nginx container.

Local compose

Before starting:

1. Copy the environment template:

   cp .env.example .env
   

2. Generate a secure token (recommended unless your reverse proxy will both authenticate every request and set OPEN_DESIGN_DISABLE_API_AUTH=1):

   openssl rand -hex 32
   

3. Open .env in your editor and choose one auth mode:

   • default: paste the token into OD_API_TOKEN=
   • trusted reverse proxy that already authenticates every request: leave OD_API_TOKEN= empty and set OPEN_DESIGN_DISABLE_API_AUTH=1

Then pull and start the service:

OPEN_DESIGN_IMAGE=ghcr.io/nexu-io/od:latest docker compose pull
OPEN_DESIGN_IMAGE=ghcr.io/nexu-io/od:latest docker compose up -d --no-build

Use ghcr.io/nexu-io/od:latest for the latest stable image, or ghcr.io/nexu-io/od:<version> to pin a supported release.

Defaults:

• Host port: 127.0.0.1:7456 (OPEN_DESIGN_PORT=8080 to publish on 127.0.0.1:8080)
• Runtime data: before documenting, changing, or choosing persistent daemon storage, you MUST read root AGENTS.md → Daemon data directory contract. This README MUST NOT restate it.
• Node heap cap: --max-old-space-size=192
• Compose memory cap: 384m (OPEN_DESIGN_MEM_LIMIT=256m to override)

Do not publish the daemon directly on a public or shared LAN interface. The API is unauthenticated for non-browser clients, so remote deployments should keep Compose bound to localhost and put an authenticated reverse proxy, SSH tunnel, or VPN in front of it.

When exposing the service through an authenticated public IP, domain, or reverse proxy, set OPEN_DESIGN_ALLOWED_ORIGINS to the exact browser origins that should be allowed to call /api:

OPEN_DESIGN_ALLOWED_ORIGINS=https://od.example.com,http://203.0.113.10:7456 docker compose up -d --no-build

If the reverse proxy already authenticates every request and you do not want it to inject Authorization: Bearer <OD_API_TOKEN> upstream, set:

OPEN_DESIGN_DISABLE_API_AUTH=1

Use this only for trusted deployments where the daemon is reachable strictly through that authenticated proxy. It disables daemon-side bearer enforcement for all /api/* requests, so direct access to the daemon must remain blocked. The Compose variable maps to daemon env OD_DISABLE_API_AUTH.

Pin a specific published image with a digest instead of the mutable latest tag:

OPEN_DESIGN_IMAGE=ghcr.io/nexu-io/od@sha256:<digest> docker compose up -d --no-build

The image intentionally does not bundle Claude/Codex/Gemini CLI binaries. Keep those outside the image, or build a separate private runtime layer if a server deployment needs local code-agent CLIs installed in the container.

If you install Codex inside an unprivileged Linux container and it fails while creating its workspace-write sandbox, opt into Codex's full-access mode for all Codex runs in that deployment:

OD_CODEX_SANDBOX=danger-full-access docker compose up -d --no-build

Only the exact value danger-full-access is supported; unknown values are ignored. Use this only for trusted, single-user deployments. It lets Codex run without the workspace-write sandbox, which is useful when the container host blocks unprivileged user namespaces, but it gives the Codex process broader filesystem access inside the container.

Manual image publish override

deploy/scripts/publish-images.sh --image_tag latest

Useful overrides:

IMAGE_NAMESPACE=your-ghcr-org deploy/scripts/publish-images.sh --arch arm64
deploy/scripts/publish-images.sh --image ghcr.io/your-org/od:0.1.0

The script defaults to:

• ghcr.io/nexu-io/od:<tag>
• linux/amd64,linux/arm64
• skopeo push strategy with registry credentials read from ~/.docker/config.json
• preloading base images through skopeo to reduce Docker Hub pull flakiness

If 127.0.0.1:7890 is available and no proxy is already set, the script uses it for registry access and passes host.docker.internal:7890 into Docker builds. The host-gateway alias is only added for builds that need this local proxy mapping.

Colima swap helper for Apple Silicon

deploy/scripts/prepare-colima-build-swap.sh is for manual Docker image publishing from an Apple Silicon macOS host that uses Colima as the Docker VM. The helper is intentionally Apple Silicon-only because the failure mode it covers is local arm64 Colima builds exhausting a small Linux VM while preparing multi-arch images. It exits before touching Colima on non-macOS or non-Apple-Silicon hosts.

Low-memory Colima VMs can run out of RAM during multi-arch image builds. The helper checks the VM memory and swap status, then creates and enables a temporary swap file only when the VM has no swap and less than 4 GiB of RAM. The 4 GiB threshold is a conservative default for short-lived manual publishes on small Colima profiles; raise COLIMA_BUILD_SWAP_MEMORY_THRESHOLD_KIB if larger builds still OOM, or lower it if you only want swap for very small VMs.

Prefer increasing the Colima VM memory (colima start --memory <GiB> or the profile config) when you want a persistent build machine. Use this helper when you need a temporary, reversible boost for one manual publish without resizing or recreating the VM.

Run it before a manual publish if Docker builds fail with out-of-memory errors, or if status shows a small Colima VM with no swap. The swap remains active until cleanup or VM restart, so use a shell trap for one-off sessions:

deploy/scripts/prepare-colima-build-swap.sh status
deploy/scripts/prepare-colima-build-swap.sh
trap 'deploy/scripts/prepare-colima-build-swap.sh cleanup' EXIT
deploy/scripts/publish-images.sh --image_tag latest

Useful overrides:

COLIMA_BUILD_SWAP_SIZE=6G deploy/scripts/prepare-colima-build-swap.sh
COLIMA_BUILD_SWAP_MEMORY_THRESHOLD_KIB=6291456 deploy/scripts/prepare-colima-build-swap.sh
COLIMA_BIN=/opt/homebrew/bin/colima deploy/scripts/prepare-colima-build-swap.sh status
COLIMA_BUILD_SWAP_CLEANUP_FORCE=1 COLIMA_BUILD_SWAPFILE=/custom-swapfile deploy/scripts/prepare-colima-build-swap.sh cleanup

cleanup removes the default helper path and the old helper path. If you set a custom COLIMA_BUILD_SWAPFILE, cleanup refuses to remove it unless COLIMA_BUILD_SWAP_CLEANUP_FORCE=1 is also set.

Docker Desktop on macOS

When running Docker Compose on macOS with OD_API_TOKEN enabled, Docker Desktop bridge networking may cause the daemon to see API requests as non-loopback peers. In that case, the web UI can fail with:

Authorization: Bearer <OD_API_TOKEN> required

Workaround:

1. Enable host networking in Docker Desktop: Docker Desktop → Settings → Resources → Network → Enable host networking → Apply and restart

2. Use a local override to docker-compose.yml:

   services:
     open-design:
       network_mode: host
       ports: []
   

3. Recreate the container:

   docker compose down
   docker compose up -d --force-recreate
   

4. Verify:

   docker inspect open-design --format '{{.HostConfig.NetworkMode}}'
   # host