add secrets sources

Author: ChristianKniep

init-plain/opt/qnib/entry/10-docker-secrets.env

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+########
+## Check for /run/secrets and expose them as ENV variables
+for sec in $(ls /run/secrets/);do
+    KEY=$(echo ${sec} |tr '[:lower:]' '[:upper:]' |sed -e 's/-/_/g')
+    declare "$KEY=$(cat /run/secrets/${sec})"
+    export $KEY
+done