Add unit tests mocha and sql

tests/sql/otp.sql

@@ -0,0 +1,26 @@
+---------------------------------------------------------------------------
+-- Listing
+--
+
+-- List current database
+select current_database();
+
+-- connect to the DB
+\c signalk
+
+-- output display format
+\x on
+
+--
+-- 
+\echo 'Count auth.accounts'
+SELECT count(*) from auth.accounts;
+\echo 'Settings auth.accounts'
+SELECT preferences->'email_notifications' as email_notifications from auth.accounts;
+SELECT preferences->'phone_notifications' as phone_notifications from auth.accounts;
+SELECT preferences->'telegram'->'chat'->'id' as telegram from auth.accounts;
+--SELECT preferences->'telegram'->'date' - INTERVAL 5 minutes from auth.accounts;
+
+SELECT count(*)
+    FROM auth.accounts
+    WHERE preferences->'telegram'->'chat'->'id' is null;