feat: optimize Dockerfile to reduce image size and build time

[Saru2003]

Description

This PR optimizes the Docker build process for the AsyncAPI CLI. The current Docker image is large and takes a long time to build. These changes address both of those concerns:

Changes Made:

• Rewrote the Dockerfile using a multi-stage build to separate dependencies and runtime.
• Switched to ghcr.io/puppeteer/puppeteer:20.8.0 as the base image - it includes Chromium out of the box, which is required by some templates.
• Added a .dockerignore file to exclude unnecessary files like node_modules, .git, test, etc., reducing build context.
• Removed unused dev tools and temporary folders post-build to slim down the image.
• Used npm prune --omit=dev to eliminate devDependencies from the final image.
• Switched to a non-root user (myuser) for safer container execution.
• Created a symlink /usr/local/bin/asyncapi so the CLI can be invoked directly.

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Performance Comparison

Image Tag	Size (GB)	Build Time (s)	Size Reduction	Build Time Improvement
asyncapi-cli-unoptimized	5.53 GB	530 s	—	—
asyncapi-cli-revised	4.32 GB	245 s	↓ 1.21 GB (↓21.88%)	↓ 285 s (↓53.77%)

Build and runtime tested locally using a fork of the repository.

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How to Build & Run

docker build -t asyncapi-cli.

docker run -it --entrypoint sh asyncapi-cli

asyncapi --version

Related issue(s)
Resolves #1798

[changeset-bot]

🦋 Changeset detected

Latest commit: 2e155c8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@asyncapi/cli	Minor

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'@asyncapi/cli': minor
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feat: optimize Dockerfile to reduce image size and build time

- 4b0017d: build: optimize Dockerfile and add .dockerignore to reduce image size

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[aeworxet]

The GitHub issue #1798 participates in the strictly serial AsyncAPI Bounty Program and is the responsibility of the assigned user.

You are welcome to choose another GitHub issue for contribution.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud