images: define sidecar container with no-auth sshd

Author: pinheadmz

src/templates/Dockerfile_sidecar

@@ -0,0 +1,12 @@
+FROM alpine:latest
+
+RUN apk add openssh
+
+RUN echo "root:" | chpasswd
+
+RUN ssh-keygen -A
+
+CMD ["/usr/sbin/sshd", "-D", \
+  "-o", "PasswordAuthentication=yes", \
+  "-o", "PermitEmptyPasswords=yes", \
+  "-o", "PermitRootLogin=yes"]