Create docker-transmission-openvpn application (#866)

* Create docker-transmission-openvpn application

* Partially addressed review 1

* Fix: Avoid .env generation error

* Add execute right on image scripts

* Fix: Force transmission home var

* Fix: unsupported custom app path

* Review: Make .env generation simpler

* Fix: Change cron command causing error due to crlf

* Review: Rework fetching WebUI

* Improve cleaning up

* Add warning message to setup vpn provider

* Rework update function

* Fix: Change var_tun default value to yes

* Review: Remove Healthcheck cron job

* Review: Directly deploy WebUI to /opt/transmission-ui/

* Make custom config persistent when updating

* Fix: fetch WebUI from correct URL (old one was invalid)

* Fix: resolve conflicting Privoxy instance

* Fix: align binary path when fetching branch vs release

* Security: Remove old and deprecated WebUI for security reasons

* Review: drop unnecessary packages and optimize implementations

* Review: Implement local network dynamic detection

* CR, OS: Migrate to Debian 13

* Use quiet mode for several commands as recommended

* Review: Replace hard coding app name instead of using var $APP

* Review: Reduce amount of msg_blocks

* refactor

* refactor

---------

Co-authored-by: Tobias <96661824+CrazyWolf13@users.noreply.github.com>

ct/transmission-openvpn.sh

@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVED/main/misc/build.func)
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: SunFlowerOwl
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://github.com/haugene/docker-transmission-openvpn
+
+APP="transmission-openvpn"
+var_tags="${var_tags:-torrent;vpn}"
+var_cpu="${var_cpu:-1}"
+var_ram="${var_ram:-512}"
+var_disk="${var_disk:-8}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_unprivileged="${var_unprivileged:-1}"
+var_tun="${var_tun:-yes}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+    header_info
+    check_container_storage
+    check_container_resources
+    if [[ ! -d /opt/transmission-openvpn/ ]]; then
+        msg_error "No ${APP} Installation Found!"
+        exit
+    fi
+
+    msg_info "Updating Dependencies"
+    $STD apt-get update
+    $STD apt-get -y upgrade
+    msg_ok "Updated Dependencies"
+
+    if check_for_gh_release "docker-transmission-openvpn" "haugene/docker-transmission-openvpn"; then
+        msg_info "Stopping Service"
+        systemctl stop openvpn-custom
+        msg_ok "Stopped Service"
+
+        msg_info "Creating Backup"
+        mv /etc/openvpn/custom /opt/transmission-openvpn/
+        rm -f /opt/transmission-openvpn/config-failure.sh
+        msg_ok "Created Backup"
+
+        fetch_and_deploy_gh_release "docker-transmission-openvpn" "haugene/docker-transmission-openvpn" "tarball" "latest" "/opt/docker-transmission-openvpn"
+
+        msg_info "Configuring transmission-openvpn"
+        rm -rf /etc/openvpn/* /etc/transmission/* /etc/scripts/* /opt/privoxy/*
+        cp -r /opt/docker-transmission-openvpn/openvpn/* /etc/openvpn/
+        cp -r /opt/docker-transmission-openvpn/transmission/* /etc/transmission/
+        cp -r /opt/docker-transmission-openvpn/scripts/* /etc/scripts/
+        cp -r /opt/docker-transmission-openvpn/privoxy/scripts/* /opt/privoxy/
+        chmod +x /etc/openvpn/*.sh
+        chmod +x /etc/scripts/*.sh
+        chmod +x /opt/privoxy/*.sh
+        msg_ok "Configured transmission-openvpn"
+
+        msg_info "Restoring Backup"
+        cp -r /opt/transmission-openvpn/custom/* /etc/openvpn/custom/
+        msg_ok "Restored Backup"
+
+        msg_info "Starting Service"
+        systemctl start openvpn-custom
+        msg_ok "Started Service"
+    fi
+
+    msg_info "Cleaning up"
+    $STD apt -y autoremove
+    $STD apt -y autoclean
+    $STD apt -y clean
+    rm -rf /opt/docker-transmission-openvpn
+    msg_ok "Cleaned"
+
+    exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Access it using the following URL:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}http://${IP}:9091${CL}"