Fix AWS Lambda container compatibility

[moti-254]

Fix AWS Lambda container deployment compatibility

Problem

Deployment of the container image to AWS Lambda failed with the following error:

The image manifest, config or layer media type for the source image is not supported.

This was caused by Docker image compatibility and architecture issues when building/pushing the container image for Lambda.

Changes Made

Dockerfile updates

• Added explicit platform targeting (linux/amd64) to both build stages
• Updated AWS Lambda Web Adapter image version
• Ensured consistent architecture across all container stages

Build process updates

• Standardized Docker build process for Lambda-compatible manifests
• Disabled BuildKit during builds to avoid OCI manifest incompatibilities with AWS Lambda

Updated Dockerfile changes

FROM --platform=linux/amd64 node:22-alpine AS frontend-builder

FROM --platform=linux/amd64 python:3.12-slim

COPY --from=public.ecr.aws/awsguru/aws-lambda-adapter:0.9.1 \
    /lambda-adapter \
    /opt/extensions/lambda-adapter

Impact

• Fixes Lambda container deployment failures
• Ensures compatibility with AWS Lambda container runtime
• Maintains existing local Docker workflow
• Preserves FastAPI + Next.js deployment architecture

Deployment Notes

Builds should be run using:

$env:DOCKER_BUILDKIT=0

before executing the Docker build command.