Add helper for loading secrets

rootfs/usr/local/bin/load_secrets

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+load_dir_env() {
+    local dir="$1"
+
+    shopt -s nullglob
+
+    for file in "$dir"/*; do
+        if [ -f "$file" ] && [[ "$(basename "$file")" != *=* ]]; then
+            varName="$(basename "$file")"
+            value="$(<"$file")"
+            export "${varName}=${value}"
+        fi
+    done
+}
+
+main() {
+    load_dir_env /run/secrets_normalized
+}
+
+main