Support installing mmdc locally and skipping downloading Chromium

[alitrack]

Skip Downloading Chromium

If you already have Chrome, Chromium, or MS Edge installed, you can skip downloading Chromium by setting the environment variable:

• For Linux or macOS:

export PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true

• For Windows:

set PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true

Adds Support for Installing mmdc (Mermaid CLI) Locally

To add support for installing mmdc (Mermaid CLI) locally on the user's machine.

Some people are having issues installing this tool globally. Installing it locally is an alternative solution:

npm install @mermaid-js/mermaid-cli

Configuration for MMDC in config.yml

Add the following configuration in your config.yml file to specify the locations of Puppeteer and MMDC:

PUPPETEER_CONFIG: "./puppeteer-config.json"
MMDC: "./node_modules/.bin/mmdc"

[voidking]

LGTM

[voidking]

Skip Downloading Chromium

If you already have Chrome, Chromium, or MS Edge installed, you can skip downloading Chromium by setting the environment variable:

• For Linux or macOS:

export PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true

• For Windows:

set PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true

Adds Support for Installing mmdc (Mermaid CLI) Locally

To add support for installing mmdc (Mermaid CLI) locally on the user's machine.

Some people are having issues installing this tool globally. Installing it locally is an alternative solution:

npm install @mermaid-js/mermaid-cli

Configuration for MMDC in config.yml

Add the following configuration in your config.yml file to specify the locations of Puppeteer and MMDC:

PUPPETEER_CONFIG: "./puppeteer-config.json"
MMDC: "./node_modules/.bin/mmdc"

The descriptions above should add to README.

[alitrack]

@voidking done

[geekan]

LGTM