Add Kiwix container installer and metadata

Introduce a complete Kiwix LXC installer: ct/kiwix.sh (container template) and install/kiwix-install.sh (in-container install). The installer installs kiwix-tools from the Kiwix PPA, creates a systemd kiwix-serve service to serve /data/*.zim on port 8080, records the package version in /root/.kiwix, and includes an update_script to upgrade kiwix-tools. The container template validates a provided ZIM_DATA directory, configures a bind mount (using ID-mapped mounts if available), sets container options, and prints the service URL. Also add json/kiwix.json catalog metadata with usage notes (including ZIM_DATA usage and file permission guidance).

ct/kiwix.sh

@@ -0,0 +1,100 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://git.community-scripts.org/community-scripts/ProxmoxVED/raw/branch/main/misc/build.func)
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: tewalds
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://github.com/kiwix/kiwix-tools
+
+APP="Kiwix"
+var_tags="${var_tags:-documentation;offline}"
+var_cpu="${var_cpu:-1}"
+var_ram="${var_ram:-512}"
+var_disk="${var_disk:-4}"
+var_os="${var_os:-ubuntu}"
+var_version="${var_version:-24.04}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+
+  if ! dpkg -s kiwix-tools &>/dev/null; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  CURRENT=$(cat /root/.kiwix 2>/dev/null || dpkg -s kiwix-tools 2>/dev/null | awk '/^Version:/{print $2}')
+
+  msg_info "Stopping Service"
+  systemctl stop kiwix-serve
+  msg_ok "Stopped Service"
+
+  msg_info "Updating Kiwix-Tools"
+  $STD apt update
+  $STD apt install -y --only-upgrade kiwix-tools
+  RELEASE=$(dpkg -s kiwix-tools 2>/dev/null | awk '/^Version:/{print $2}')
+  echo "${RELEASE}" >/root/.kiwix
+  msg_ok "Updated Kiwix-Tools"
+
+  if [[ "$CURRENT" == "$RELEASE" ]]; then
+    msg_ok "Already on latest version: ${CURRENT}"
+  else
+    msg_ok "Updated successfully from ${CURRENT} to ${RELEASE}!"
+  fi
+
+  msg_info "Starting Service"
+  systemctl start kiwix-serve
+  msg_ok "Started Service"
+  exit
+}
+
+start
+build_container
+
+msg_info "Validating ZIM directory."
+if [[ -z "${ZIM_DATA:-}" ]]; then
+  msg_error "ZIM_DATA cannot be empty. Please run with ZIM_DATA=/path/to/zims"
+  exit 1
+fi
+if [[ ! -d "$ZIM_DATA" ]]; then
+  msg_error "Directory '$ZIM_DATA' does not exist."
+  exit 1
+fi
+if ! ls "${ZIM_DATA}"/*.zim >/dev/null 2>&1; then
+  msg_error "No .zim files found in '$ZIM_DATA'"
+  exit 1
+fi
+msg_ok "Using ZIM directory: ${ZIM_DATA}"
+
+msg_info "Configuring Bind Mount"
+
+if pct set $CTID -features mountidmap=1 2>/dev/null; then
+  msg_info "Enabled ID-mapped mounts (ownership preserved)"
+  pct set $CTID -mp0 "$ZIM_DATA,mp=/data,ro=1"
+  msg_ok "Bind Mount Configured (read-only, ownership preserved)"
+else
+  msg_info "ID-mapped mounts not available, using standard mount"
+  msg_info "Note: Files will appear as nobody:nogroup inside container"
+  msg_info "Ensure ZIM files are world-readable: chmod -R a+rX ${ZIM_DATA}"
+  pct set $CTID -mp0 "$ZIM_DATA,mp=/data"
+  msg_ok "Bind Mount Configured (read-write mount, read-only service)"
+fi
+
+msg_info "Starting Service"
+pct exec $CTID -- systemctl start kiwix-serve
+msg_ok "Started Service"
+
+msg_info "Setting Container Options"
+pct set $CTID --onboot 1
+msg_ok "Container Options Set"
+
+msg_ok "Completed Successfully!\n"
+IP=$(pct exec $CTID -- hostname -I | awk '{print $1}')
+echo -e "${TAB}${GATEWAY}${BGN}Web Interface:${CL} ${BL}http://${IP}:8080${CL}"
+echo -e "${TAB}${INFO}${BGN}ZIM Directory:${CL} ${ZIM_DATA} ${DGN}→${CL} ${BGN}/data${CL}"