Build a python zip file with dependencies for AWS lambda

Dockerfile

FROM public.ecr.aws/lambda/python:3.8 as builder
RUN yum install -y zip

WORKDIR /var/task/
COPY setup.py pyproject.toml ./
COPY src ./src/
RUN pip install --no-cache-dir . --target dist

WORKDIR /var/task/dist
RUN zip --quiet -r9X /var/task/function.zip .

FROM scratch
COPY --from=builder /var/task/function.zip /

To build run:

docker build -o dist .