New Script: Element Synapse (#1955)

* add element synapse script

* Update install/elementsynapse-install.sh

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

* Update install/elementsynapse-install.sh

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

* fixes

* fixes v2

---------

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

install/elementsynapse-install.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: tremor021
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+
+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
+  sudo \
+  curl \
+  mc \
+  lsb-release \
+  wget \
+  apt-transport-https \
+  debconf-utils
+msg_ok "Installed Dependencies"
+
+msg_info "Installing Element Synapse"
+wget -O /usr/share/keyrings/matrix-org-archive-keyring.gpg https://packages.matrix.org/debian/matrix-org-archive-keyring.gpg
+echo "deb [signed-by=/usr/share/keyrings/matrix-org-archive-keyring.gpg] https://packages.matrix.org/debian/ $(lsb_release -cs) main" | tee /etc/apt/sources.list.d/matrix-org.list
+$STD apt-get update
+echo "matrix-synapse-py3 matrix-synapse/server-name string matrix" | debconf-set-selections
+echo "matrix-synapse-py3 matrix-synapse/report-stats boolean false" | debconf-set-selections
+$STD apt-get install matrix-synapse-py3 -y
+sed -i 's/127.0.0.1/0.0.0.0/g' /etc/matrix-synapse/homeserver.yaml
+systemctl enable -q --now matrix-synapse
+msg_ok "Installed Element Synapse"
+
+motd_ssh
+customize
+
+msg_info "Cleaning up"
+$STD apt-get -y autoremove
+$STD apt-get -y autoclean
+msg_ok "Cleaned"