Install in ubuntu redpanda

[NIKFIORE]

Hi i want to execute a benthos script with docker. I need to use a ubuntu image because i want also use a python script. I can't understand how to install redpanda and execute this type of file
`FROM ubuntu:latest

WORKDIR /home

RUN apt-get update && apt-get upgrade -y && \
apt-get install -y python3 python3-pip python3-venv curl unzip &&
apt-get clean

RUN python3 -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

RUN pip install --upgrade pip
RUN pip install cassandra-driver

RUN curl -LO https://github.com/redpanda-data/redpanda/releases/latest/download/rpk-linux-amd64.zip &&
mkdir -p /local/bin &&
unzip rpk-linux-amd64.zip -d /local/bin/ &&
rm rpk-linux-amd64.zip

ENV PATH="/local/bin:$PATH"

COPY ./src /home

USER 1000

CMD ["rpk", "redpanda", "start", "--install-dir", "/local/bin", "-c", "/home/main.yaml"]`

this is the error, when i execute:

WARNING: This is a setup for development purposes only; in this mode your clusters may run unrealistically fast and data can be corrupted any time your computer shuts down uncleanly. benthos-container | Error: mkdir /etc/redpanda: permission denied

if someone can give me advice how to resolve it would be a pleasure