Create mattermost.sh, mattermost-install.sh, and mattermost.json

ct/mattermost.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+source <(curl -s https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: Kaedon Cleland-Host (dracentis)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://mattermost.com/
+
+# App Default Values
+APP="Mattermost"
+var_tags="sync"
+var_cpu="1"
+var_ram="2048"
+var_disk="8"
+var_os="Ubuntu"
+var_version="24.04"
+var_unprivileged="1"
+
+# App Output & Base Settings
+header_info "$APP"
+base_settings
+
+# Core
+variables
+color
+catch_errors
+
+function update_script() {
+    header_info
+    check_container_storage
+    check_container_resources
+    if [[ ! -f /etc/apt/sources.list.d/mattermost.list ]]; then
+        msg_error "No ${APP} Installation Found!"
+        exit
+    fi
+    msg_info "Updating ${APP} LXC"
+    apt-get update &>/dev/null
+    apt-get -y upgrade &>/dev/null
+    msg_ok "Updated Successfully"
+    exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${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}:8065${CL}"