Not able to use terraform command on OpenFaas Python 3 Function deployment

Question

I am using a Openfaas Python3 function with terraform to create bucket in my AWS Account. I am trying it locally and created a local cluster using k3s and installed openfaas cli. Steps: Created local cluster and deployed faas-netes. Created a new project using openfaas template of python3. Exposed the port. Changed my project yaml file with new host on gateway key in provider. I am creating my tf files with python only and I am sure that the files are created with proper info as checked it by executing ls and printing the file data after closing the file. Checked if terraform is installed in image and live by executing terraform--version.

I have already changes my dockerfile to have terraform installed while building image. OS: Ubuntu 20.04 Docker: 20.10.15 Faas-CLI: 0.14.2

Docker File

FROM --platform=${TARGETPLATFORM:-linux/amd64} ghcr.io/openfaas/classic-watchdog:0.2.0 as watchdog
FROM --platform=${TARGETPLATFORM:-linux/amd64} python:3-alpine

ARG TARGETPLATFORM
ARG BUILDPLATFORM

# Allows you to add additional packages via build-arg
ARG ADDITIONAL_PACKAGE

COPY --from=watchdog /fwatchdog /usr/bin/fwatchdog
RUN chmod +x /usr/bin/fwatchdog
RUN apk --no-cache add ca-certificates ${ADDITIONAL_PACKAGE}
RUN apk add --no-cache wget
RUN apk add --no-cache unzip

RUN wget https://releases.hashicorp.com/terraform/1.1.9/terraform_1.1.9_linux_amd64.zip
RUN unzip terraform_1.1.9_linux_amd64.zip
RUN mv terraform /usr/bin/
RUN rm terraform_1.1.9_linux_amd64.zip


# Add non root user
RUN addgroup -S app && adduser app -S -G app

WORKDIR /home/app/

COPY index.py           .
COPY requirements.txt   .

RUN chown -R app /home/app && \
  mkdir -p /home/app/python && chown -R app /home/app
USER app
ENV PATH=$PATH:/home/app/.local/bin:/home/app/python/bin/
ENV PYTHONPATH=$PYTHONPATH:/home/app/python

RUN pip install -r requirements.txt --target=/home/app/python

RUN mkdir -p function
RUN touch ./function/__init__.py

WORKDIR /home/app/function/
COPY function/requirements.txt  .

RUN pip install -r requirements.txt --target=/home/app/python

WORKDIR /home/app/

USER root

COPY function           function

# Allow any user-id for OpenShift users.
RUN chown -R app:app ./ && \
  chmod -R 777 /home/app/python

USER app

ENV fprocess="python3 index.py"
EXPOSE 8080

HEALTHCHECK --interval=3s CMD [ -e /tmp/.lock ] || exit 1

CMD ["fwatchdog"]

Handler.py

import os
import subprocess

def handle(req):
    """handle a request to the function
    Args:
        req (str): request body
    """
    print(os.system("terraform --version"))
    with open('terraform-local/bucket.tf','w') as resourcefile:
        resourcefile.write('resource "aws_s3_bucket" "ABHINAV" { bucket = "new"}')
        resourcefile.close()
    with open('terraform-local/main.tf','w') as mainfile:
        mainfile.write('provider "aws" {' + '\n')
        mainfile.write('access_key = ""' + '\n')
        mainfile.write('secret_key = ""' + '\n')
        mainfile.write('region = "ap-south-1"'+ '\n')
        mainfile.write('}')
        mainfile.close()
    print(os.system("ls"))
    os.system("terraform init")
    os.system("terraform plan")
    os.system("terraform apply -auto-approve")
    return req

But still not able to use terraform commands like terraform init and create bucket on AWS.