Install rsync in ct/commafeed.sh (#4086)

* Install rsync in ct/commafeed.sh

This commit installs rsync in the update script of commafeed for users who used the install script before rsync was added.

* Update commafeed.sh

Author: mzhaodev

ct/commafeed.sh

@@ -33,6 +33,13 @@ function update_script() {
     systemctl stop commafeed
     msg_ok "Stopped ${APP}"
 
+    if ! [[ $(dpkg -s rsync 2>/dev/null) ]]; then
+      msg_info "Installing Dependencies"
+      $STD apt-get update
+      $STD apt-get install -y rsync
+      msg_ok "Installed Dependencies"
+    fi
+
     msg_info "Updating ${APP} to ${RELEASE}"
     curl -fsSL "https://github.com/Athou/commafeed/releases/download/${RELEASE}/commafeed-${RELEASE}-h2-jvm.zip" -o $(basename "https://github.com/Athou/commafeed/releases/download/${RELEASE}/commafeed-${RELEASE}-h2-jvm.zip")
     unzip -q commafeed-"${RELEASE}"-h2-jvm.zip