backend rework- full test 1

db/README.md

@@ -0,0 +1,20 @@
+# COMMANDS DB description
+
+## one command contains:
+-   command
+-   status
+-   command_id
+-   tstamp
+
+### command may contain one out of following strings:
+```["toggle_machine","","","","","",""]```
+
+### status may contain one out of following strings:
+```["pending","failed","served","rejected"]```
+
+### command_id is a random generated 4 chars long integer to identify the exact command between Server frontend Database and ESP
+
+### tstamp is the exact Date at the first ever creation of the db entry and does not say anything about completion or rejection.
+
+## NOTE:
+### A created command is marked as failed after 5 minutes if its status is still pending, to ensure that no processes continue after a communication failure in the chain.