better systemd configuration

utils.py

@@ -47,6 +47,7 @@ def get_dcc_cert_doc_dummy():
     
 def get_dcc_cert_doc(year_cert):
     url = '{}{}'.format(config['cert_doc_url'], year_cert)
+    print('############ ' + url)
     try:
         r = requests.get(url)
         d = r.json()

vl-dcc.service

 [Unit]
 Description=The vl-dcc daemon.
-After=network.target
+Requires=network-online.target
+After=network-online.target
 
 [Service]
 User=nobody