git clone https://github.com/jihchi/mermaid.ink.git
cd mermaid.ink
pnpm install
DEBUG=app:* pnpm start

Go to http://localhost:3000

See here for supported tags.

docker run --cap-add=SYS_ADMIN ghcr.io/jihchi/mermaid.ink

Go to http://localhost:3000

If you don't / can't add --cap-add=SYS_ADMIN to the command, please refer to 3 ways to securely use Chrome Headless with this image to find the most suitable solution for your case.

For example, you can use Jessie Frazelle seccomp profile for Chrome:

wget https://raw.githubusercontent.com/jfrazelle/dotfiles/master/etc/docker/seccomp/chrome.json
docker run --security-opt seccomp=$(pwd)/chrome.json ghcr.io/jihchi/mermaid.ink

Note that you may encounter DoS if you increase --max-http-header-size!

Thanks @ryepup for the analysis and work-arounds (#12)

• If running locally, add --max-http-header-size to the start script in package.json

  • e.g. "start": "node --max-http-header-size=102400000 src/index.js"

• If running via docker, use NODE_OPTIONS to increase --max-http-header-size

  • e.g. docker run --rm -it -e 'NODE_OPTIONS="--max-http-header-size=102400000"' -p 3000:3000 jihchi/mermaid.ink

Or, If running locally, run NODE_OPTIONS="--max-http-header-size=102400000" npm start to increase --max-http-header-size

Many thanks for your help!

The image of contributors is made with contrib.rocks.