Add Discourse container install and metadata

Add support for deploying Discourse as a container: adds ct/discourse.sh (container build/install/update flow and resource defaults), frontend/public/json/discourse.json (app metadata, install resources, and notes), and install/discourse-install.sh (full installer that installs dependencies, Postgres/Node/Ruby, clones the Discourse repo, generates secrets and DB password saved to /opt/discourse/.env, installs gems and yarn, precompiles assets, runs migrations, creates an admin user, sets up a systemd service and nginx reverse proxy, and enables required services). Admin user 'admin' is created with a generated password stored in the .env file.

ct/discourse.sh

@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVED/main/misc/build.func)
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://www.discourse.org/
+
+APP="Discourse"
+var_tags="${var_tags:-forum;community;discussion}"
+var_cpu="${var_cpu:-4}"
+var_ram="${var_ram:-4096}"
+var_disk="${var_disk:-20}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+
+  if [[ ! -d /opt/discourse ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  if [[ ! -f /opt/discourse/.env ]]; then
+    msg_error "No Discourse Configuration Found!"
+    exit
+  fi
+
+  msg_info "Stopping Service"
+  systemctl stop discourse
+  msg_ok "Stopped Service"
+
+  msg_info "Backing up Data"
+  cp /opt/discourse/.env /opt/discourse_env.bak
+  msg_ok "Backed up Data"
+
+  msg_info "Updating Discourse"
+  cd /opt/discourse
+  git pull origin main
+  $STD bundle install --deployment --without test development
+  $STD yarn install
+  $STD bundle exec rails assets:precompile
+  $STD bundle exec rails db:migrate
+  msg_ok "Updated Discourse"
+
+  msg_info "Restoring Configuration"
+  mv /opt/discourse_env.bak /opt/discourse/.env
+  msg_ok "Restored Configuration"
+
+  msg_info "Starting Service"
+  systemctl start discourse
+  msg_ok "Started Service"
+  msg_ok "Updated successfully!"
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${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}${CL}"
+echo -e "${INFO}${YW} Default Credentials:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}Username: admin${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}Password: Check /opt/discourse/.env${CL}"