add package image

[itsmostafa]

This pull request updates the compose.yml file to specify container images for the web and api services. These changes ensure that the services use pre-built images from the GitHub Container Registry instead of building them locally.

Updates to compose.yml:

• Added the image property for the web service, specifying the image ghcr.io/cisagov/cset-web:latest.
• Added the image property for the api service, specifying the image ghcr.io/cisagov/cset-api:latest.

🗣 Description

💭 Motivation and context

🧪 Testing

tested locally

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All relevant repo and/or project documentation has been updated to reflect the changes in this PR.
• Tests have been added and/or modified to cover the changes in this PR.
• Create a pre-release (necessary if and only if the pre-release version was bumped).