Make it possible to configure different log levels for stderr and file logging

.env.tpl

@@ -121,10 +121,6 @@ NOPAQUE_SOCKETIO_MESSAGE_QUEUE_URI=
 # DEFAULT: %Y-%m-%d %H:%M:%S
 # NOPAQUE_LOG_DATE_FORMAT=
 
-# DEFAULT: <nopaque-basedir>/logs
-# NOTE: Use `.` as <nopaque-basedir>
-# NOPAQUE_LOG_DIR=
-
 # DEFAULT: [%(asctime)s] %(levelname)s in %(pathname)s (function: %(funcName)s, line: %(lineno)d): %(message)s
 # NOPAQUE_LOG_FORMAT=
 
@@ -132,9 +128,25 @@ NOPAQUE_SOCKETIO_MESSAGE_QUEUE_URI=
 # CHOOSE ONE: CRITICAL, ERROR, WARNING, INFO, DEBUG
 # NOPAQUE_LOG_LEVEL=
 
+# CHOOSE ONE: False, True
+# DEFAULT: True
+# NOPAQUE_LOG_FILE_ENABLED=
+
+# DEFAULT: <nopaque-basedir>/logs
+# NOTE: Use `.` as <nopaque-basedir>
+# NOPAQUE_LOG_FILE_DIR=
+
+# DEFAULT: NOPAQUE_LOG_LEVEL
+# CHOOSE ONE: CRITICAL, ERROR, WARNING, INFO, DEBUG
+# NOPAQUE_LOG_FILE_LEVEL=
+
 # CHOOSE ONE: False, True
 # DEFAULT: False
-# NOPAQUE_LOG_TO_STDOUT=
+# NOPAQUE_LOG_STDERR_ENABLED=
+
+# DEFAULT: NOPAQUE_LOG_LEVEL
+# CHOOSE ONE: CRITICAL, ERROR, WARNING, INFO, DEBUG
+# NOPAQUE_LOG_STDERR_LEVEL=
 
 # DEFAULT: 0
 # Number of values to trust for X-Forwarded-For