prepare switch to log/slog

This commit prepares the switch from log to log/slog, which was
introduced in Go 1.21.
slog provides some useful facilities to add metadata to log entries,
which should be helpful for debugging problems.

This commit also adds a small transaction ID generator. It provides a
common identifier between log messages, so that multiple errors can be
viewed together in their order.

1 files changed, 13 insertions, 0 deletions

diff --git a/monfront.conf.example b/monfront.conf.example
index 26a6422..57da37f 100644
--- a/monfront.conf.example
+++ b/monfront.conf.example
@@ -64,3 +64,16 @@ mode = "all"
 # The list defines the usernames allowed to change data in the frontend. They
 # must be authenticated to get the permission.
 #list = ["user1", "user2"]
+
+[log]
+# With format the log output format can be switched between `text`
+# and `json` output.
+#format = "text"
+
+# With level the amount of logs can be reduced when necessary. The supported
+# levels are `error`, `warn`, `info` and `debug`.
+#level = "info"
+
+# Output decides where to send all generated log output. It can either be a path
+# or one of the special outputs `stdout` or `stderr`.
+#output = "stderr"