Write log file

#94 (closed)

sohstationviewer/conf/constants.py

 from typing import Literal
 
+# The current version of SOHStationViewer
+SOFTWARE_VERSION = '2023.1.0.0'
+
 # waveform pattern
 WF_1ST = 'A-HLM-V'
 WF_2ND = 'HLN'
@@ -56,6 +59,7 @@ CONFIG_PATH = 'sohstationviewer/conf/read_settings.ini'
 # List of image formats. Have to put PNG at the beginning to go with
 # dpi in dialog
 IMG_FORMAT = ['PNG', 'PDF', 'EPS', 'SVG']
+
 # ================================================================= #
 #                      PLOTTING CONSTANT
 # ================================================================= #