Dockerfile: apt -> apt-get
Dockerfile commands should be using apt-get, not apt.
@@ -28,8 +28,8 @@ ARG MAKEFLAGS_PARALLEL=""
ENV DEBIAN_FRONTEND noninteractive
-RUN apt update \
- && apt -y install software-properties-common \
+RUN apt-get update \
+ && apt-get -y install software-properties-common \
&& rm -rf /var/lib/apt/lists
RUN add-apt-repository -y ppa:team-gcc-arm-embedded/ppa
