Add while loop to prevent crash when DB not ready

src/main.py

@@ -14,7 +14,7 @@
 #     program.  If not, see
 #     https://git.fjla.uk/OwlBoard/db-manager/src/branch/main/LICENSE
 
-version = "2.1.1"
+version = "2.1.2"
 print(f"main.py: Initialising db-manager v{version}")
 
 #Third Party Imports
@@ -27,9 +27,15 @@ import logger as log
 
 log.out("main.py: db-manager Initialised", "INFO")
 
-    
-#Ensure count document exists in meta:
-mongo.metaCounters()
+
+#Ensure count document exists in meta, wrap in while look to prevent crashing if the DB is not ready:
+dbReady = False
+while dbReady is False:
+    try:
+        mongo.metaCounters()
+        dbReady = True
+    except:
+        dbReady = False
 
 #Check & Update corpus/stations:
   # If older than 12 days then update