* [NOD-319] Add query params to api server route handler
* Temp commit
* [NOD-322] Make database.DB a function
* [NOD-322] Move context to be the first parameter in all functions
* [NOD-322] Set db to nil on database.Close()
* [NOD-322] Tidy go.mod/go.sum
* [NOD-323] Move rpc-client to separate package
* [NOD-309] Add controller for POST /transaction
* [NOD-309] Added route for POST /transaction
* [NOD-309] in POST /transaction: Forward reject errors to client
* [NOD-309] Added custom client messages to errors in POST /transaction
* [NOD-309] Use utils.NewInternalServerHandlerError where appropriate
