a first stab at a docker compose up matrix 2.0 stack

init/generate-synapse-secrets.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/bash
+
+# a replacement entrypoint script for the synapse docker image which generates default config & secrets if needed.
+
+if [[ -f ${SYNAPSE_CONFIG_PATH} ]]
+then
+	echo "Synapse config found - not generating default"
+	exit 0
+fi
+
+echo "Synapse config not found - generating default for secrets"
+exec /start.py generate