[Add] confd config files

docker/confd/Dockerfile

@@ -7,6 +7,7 @@ RUN dnf update -y && \
 RUN curl -fsSL https://github.com/abtreece/confd/releases/download/v0.20.0/confd-v0.20.0-linux-amd64.tar.gz | tar -xz -C /usr/local/bin && \
     chmod +x /usr/local/bin/confd
 
-RUN mkdir /etc/confd
+RUN mkdir /etc/confd && \
+    mkdir /data
 
-CMD [ "confd","-watch", "-backend", "etcd", "-node", "http://etcd:2379"]
+CMD [ "confd"]