feat(installations): support secrets file for all environment variables (#5125)

Co-authored-by: Meier Lukas <meierschlumpf@gmail.com>

scripts/entrypoint.sh

@@ -18,6 +18,19 @@ if [ "${PUID}" != "0" ] || [ "${PGID}" != "0" ]; then
     echo "Changing owner to $PUID:$PGID, done."
 fi
 
+# support _FILE Suffix for environment variables
+for file_var in $(env | cut -d '=' -f 1 | grep "_FILE$"); do
+    target_var=$(echo "$file_var" | cut -d'=' -f1 | sed 's/_FILE//')
+    file_path=$(printenv "$file_var")
+
+    if [ -f "$file_path" ]; then
+        export "$target_var"=$(cat "$file_path" | tr -d '\n\r')
+        echo "Info: Loaded secret for $target_var from $file_path"
+    else
+        echo "Warning: Secret file $file_path not found for $target_var"
+    fi
+done
+
 if [ "${PUID}" != "0" ]; then
     exec su-exec $PUID:$PGID "$@"
 else