Consolidate FRR+Bird+VPP into /config for bind-mounting; Move to multitool for the linux client, it has SSH

docker/Dockerfile

@@ -42,11 +42,13 @@ RUN curl -s -o /usr/share/keyrings/frrouting.gpg https://deb.frrouting.org/frr/k
 # Install Bird2
 RUN curl -s -o /usr/share/keyrings/cznic-labs-pkg.gpg https://pkg.labs.nic.cz/gpg && \
     echo "deb [signed-by=/usr/share/keyrings/cznic-labs-pkg.gpg] https://pkg.labs.nic.cz/bird2 noble main" \
-         > /etc/apt/sources.list.d/cznic-labs-bird2.list  && \
+         > /etc/apt/sources.list.d/cznic-labs-bird2.list && \
     apt -y update && apt -y install bird2 && apt clean
 
 # Config files
 COPY files/etc/ /etc/
+RUN mkdir /config \
+    && for i in vpp bird frr; do mv /etc/$i /config/$i; ln -sf /config/$i /etc/$i; done
 COPY files/init-container.sh /sbin/
 RUN chmod 755 /sbin/init-container.sh
 CMD ["/sbin/init-container.sh"]