How can I run a custom docker image with multiple Lambda handlers? - aws-lambda

Question

This is my dockerfile. I have also a app.py file with two handlers and I need to be able to run one of them based of a variable or similar. Right now I run only lambda.handler1, but also I want to run lambda.handler2
# Define global args
ARG FUNCTION_DIR="/home/app/"
ARG RUNTIME_VERSION="3.8"
# Bundle base image + runtime
FROM python:${RUNTIME_VERSION}-buster
# Include global args
ARG FUNCTION_DIR
ARG RUNTIME_VERSION
# Install aws-lambda-cpp build dependencies
RUN apt-get update && \
apt-get install -y \
g++ \
make \
cmake \
unzip \
libcurl4-openssl-dev
# Install OCR build dependencies
RUN apt-get update \
&& apt-get install -y tesseract-ocr tesseract-ocr-spa \
&& apt-get install -y poppler-utils
RUN apt-get update \
&& apt-get install libgl1 -y
RUN python${RUNTIME_VERSION} -m pip install --upgrade pip
RUN python${RUNTIME_VERSION} -m pip install tesseract pillow pytesseract
# Copy handler function
RUN mkdir -p ${FUNCTION_DIR}
COPY app/* ${FUNCTION_DIR}
# Install Lambda Runtime Interface Client for Python
RUN python${RUNTIME_VERSION} -m pip install awslambdaric --target ${FUNCTION_DIR}
# Install the function's dependencies
RUN python${RUNTIME_VERSION} -m pip install -r ${FUNCTION_DIR}/docker-requirements.txt
# Set working directory to function root directory
WORKDIR ${FUNCTION_DIR}
# (Optional) Add Lambda Runtime Interface Emulator and use a script in the ENTRYPOINT for simpler local runs
ADD https://github.com/aws/aws-lambda-runtime-interface-emulator/releases/latest/download/aws-lambda-rie /usr/bin/aws-lambda-rie
COPY entry.sh /
RUN chmod 755 /usr/bin/aws-lambda-rie /entry.sh
ENTRYPOINT [ "/entry.sh"]
CMD [ "app.lambda_handler1" ]