chore(docker): Add ARG for the architecture

Author: gounthar

dockerfiles/cpp/Dockerfile

@@ -1,5 +1,8 @@
 FROM jenkins/ssh-agent:6.9.0
 
+ARG TARGETARCH
+ENV ARCHITECTURE=$TARGETARCH
+
 # Install necessary C++ build tools
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \