Add config option for log timestamp format

.env.template

@@ -44,6 +44,10 @@
 ## Enable extended logging, which shows timestamps and targets in the logs
 # EXTENDED_LOGGING=true
 
+## Timestamp format used in extended logging.
+## Format specifiers: https://docs.rs/chrono/latest/chrono/format/strftime
+# LOG_TIMESTAMP_FORMAT="%Y-%m-%d %H:%M:%S"
+
 ## Logging to file
 ## It's recommended to also set 'ROCKET_CLI_COLORS=off'
 # LOG_FILE=/path/to/log

src/config.rs

@@ -329,6 +329,8 @@ make_config! {
         reload_templates:       bool,   true,   def,    false;
         /// Enable extended logging
         extended_logging:       bool,   false,  def,    true;
+        /// Log timestamp format
+        log_timestamp_format:   String, true,   def,    "%Y-%m-%d %H:%M:%S".to_string();
         /// Enable the log to output to Syslog
         use_syslog:             bool,   false,  def,    false;
         /// Log file path

src/main.rs

@@ -130,8 +130,8 @@ fn init_logging(level: log::LevelFilter) -> Result<(), fern::InitError> {
     if CONFIG.extended_logging() {
         logger = logger.format(|out, message, record| {
             out.finish(format_args!(
-                "{}[{}][{}] {}",
-                chrono::Local::now().format("[%Y-%m-%d %H:%M:%S]"),
+                "[{}][{}][{}] {}",
+                chrono::Local::now().format(&CONFIG.log_timestamp_format()),
                 record.target(),
                 record.level(),
                 message