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terrydash 97bb350dd6 feat: add support for self-hosted draw.io via DRAWIO_BASE_URL environment variable (#163 )

## Summary
Add support for self-hosted draw.io instances via build-time configuration.

## Problem
In some corporate environments, `embed.diagrams.net` is blocked by network policies. 
Users cannot use the application without access to the default draw.io embed URL.

## Solution
- Add `NEXT_PUBLIC_DRAWIO_BASE_URL` environment variable support
- Pass the `baseUrl` prop to the `DrawIoEmbed` component
- Configure Dockerfile to accept build-time argument for the draw.io URL

## Usage
```yaml
# docker-compose.yaml
services:
  drawio:
    image: jgraph/drawio:latest
    ports:
      - "8080:8080"
  
  next-ai-draw-io:
    build:
      context: .
      args:
        - NEXT_PUBLIC_DRAWIO_BASE_URL=http://drawio:8080
```

Or build directly:
```bash
docker build --build-arg NEXT_PUBLIC_DRAWIO_BASE_URL=http://localhost:8080 -t next-ai-draw-io .
```

**Note:** This is a build-time configuration. To change the draw.io URL, you need to rebuild the Docker image.

2025-12-09 22:00:54 +09:00

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Self-Hosted Draw.io Configuration

In some corporate environments, embed.diagrams.net is blocked by network policies. This guide explains how to use a self-hosted draw.io instance with Next AI Draw.io.

Configuration

Set the NEXT_PUBLIC_DRAWIO_BASE_URL environment variable to point to your self-hosted draw.io instance. This is a build-time configuration, meaning you need to rebuild the Docker image to change the URL.

Docker Build

# Build with custom draw.io URL
docker build --build-arg NEXT_PUBLIC_DRAWIO_BASE_URL=http://your-drawio-server:8080 -t next-ai-draw-io .

# Run the custom build
docker run -d -p 3000:3000 --env-file .env next-ai-draw-io

Docker Compose

services:
  drawio:
    image: jgraph/drawio:latest
    ports:
      - "8080:8080"

  next-ai-draw-io:
    build:
      context: .
      args:
        - NEXT_PUBLIC_DRAWIO_BASE_URL=http://drawio:8080
    ports:
      - "3000:3000"
    env_file:
      - .env

Running Draw.io Locally

You can run the official draw.io Docker image:

docker run -d -p 8080:8080 jgraph/drawio:latest

Then build Next AI Draw.io with:

docker build --build-arg NEXT_PUBLIC_DRAWIO_BASE_URL=http://localhost:8080 -t next-ai-draw-io .

Notes

The default draw.io URL is https://embed.diagrams.net
Changes to NEXT_PUBLIC_DRAWIO_BASE_URL require rebuilding the Docker image
For local development, you can set this in .env.local

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