I can't cache the docker step to perform guix-install.sh, because it requires a user input which causes the `docker build -t guix:latest path/to/directory/with/Dockerfile` to ERR1.

Proposing to add command line option `--quiet` for the installer to not ask

Relevant dockerfile:

```dockerfile
#@ All rights reserved (C) Jacob Hrbek <rsa4096/0x31AE4020956E0A9A> in 30/10/2021-EU 01:22:40 UTC

# TODO(Krey): Set as FLOSS once finished

###!!! HALTED(Krey): The guix-install.sh requires an interactive shell blocking the deployment

# 30/10/2021-EU 01:44:14 UTC
FROM debian:bullseye-20211011-slim
LABEL Description="Minimal Debian Linux Image with GUIX package manager designed for testing"
# 30/10/2021-EU 01:24:54 UTC
LABEL Version="30102021012454"

ENV DEBIAN_FRONTEND="noninteractive"

# OUTSOURCED(Krey): Guix's official way to install the package manager on non-GUIX system is using https://git.savannah.gnu.org/cgit/guix.git/plain/etc/guix-install.sh
# 30/10/2021-EU 01:24:54 UTC
ENV guixInstall_commit="e4ed0b3969ddbe44347c468c96ccfa057b2dd256"
RUN true \
&& apt-get update \
&& apt-get install --yes --quiet --no-install-recommends \
wget \
gnupg \
xz-utils \
# NOTE(Krey): We need this otherwise wget will fail with `ERROR: The certificate of '' is not trusted`
ca-certificates \
&& wget "https://git.savannah.gnu.org/cgit/guix.git/plain/etc/guix-install.sh?id=$guixInstall_commit" -O guix-install.sh \
# Add guix-install dependencies
&& chmod +x guix-install.sh \
&& sh guix-install.sh \
&& apt-get remove --yes \
wget \
gnupg \
xz-utils \
&& apt-get autoremove --yes \
&& apt-get clean --yes \
&& rm -rf \
/var/cache/debconf/* \
/var/lib/apt/lists/* \
/tmp/* \
/var/tmp/*

```

-- Jacob "Kreyren" Hrbek

Sent with ProtonMail Secure Email.