Add Dokploy install and container scripts

Introduces Dokploy support with installation and container setup scripts, and adds metadata for frontend integration. These changes enable automated deployment and management of Dokploy as a container, including resource configuration and update handling.

install/dokploy-install.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://dokploy.com/
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing Dependencies"
+$STD apt-get install -y \
+  git \
+  openssl
+msg_ok "Installed Dependencies"
+
+msg_warn "WARNING: This script will run an external installer from a third-party source (https://dokploy.com/)."
+msg_warn "The following code is NOT maintained or audited by our repository."
+msg_warn "If you have any doubts or concerns, please review the installer code before proceeding:"
+msg_custom "${TAB3}${GATEWAY}${BGN}${CL}" "\e[1;34m" "→  https://dokploy.com/install.sh"
+echo
+read -r -p "${TAB3}Do you want to continue? [y/N]: " CONFIRM
+if [[ ! "$CONFIRM" =~ ^([yY][eE][sS]|[yY])$ ]]; then
+  msg_error "Aborted by user. No changes have been made."
+  exit 10
+fi
+
+msg_info "Installing Dokploy (Patience - this installs Docker and pulls containers)"
+$STD bash <(curl -sSL https://dokploy.com/install.sh)
+msg_ok "Installed Dokploy"
+
+motd_ssh
+customize
+cleanup_lxc