small corrections: timestamp and metadata on images, headers in index.html

all_countries.py

@@ -3,6 +3,7 @@ Plot overview plot for each country separately
 """
 import matplotlib.pyplot as pp
 import numpy as np
+import time as time_module
 basename="all_"
 
 def plot(data, countries):
@@ -26,6 +27,7 @@ def plot(data, countries):
         fig.legend(frameon=False, loc="upper left", bbox_to_anchor=(0,1), bbox_transform=ax1.transAxes)
         pp.title(loc)
         fig.tight_layout()
+        pp.text(0.002,0.005, f"plot generated {time_module.strftime('%Y-%m-%d %H:%M')}, CC-by-sa-nc, origin: dukun.de/corona, datasource: ourworldindata.org/coronavirus-source-data", color="dimgrey", fontsize=8, transform=fig.transFigure)
 
         pp.savefig("ac_"+name+".png")
         pp.close(fig)