Use apt-get instead of apt (#6)

Dockerfile

@@ -4,7 +4,7 @@ ARG BASE_IMAGE=debian:bookworm-slim
 FROM --platform=$TARGETPLATFORM ubuntu:22.04 AS builder
 # need to specify the ARG again to make it available in this stage
 ARG PIXI_VERSION
-RUN apt update && apt install -y curl
+RUN apt-get update && apt-get install -y curl
 # download the musl build since the gnu build is not available on aarch64
 RUN curl -Ls \
     "https://github.com/prefix-dev/pixi/releases/download/v${PIXI_VERSION}/pixi-$(uname -m)-unknown-linux-musl" \