* [NOD-380] Add MQTT to the project.
* [NOD-380] Add MQTT params to config.
* [NOD-380] Implement connecting to an mqtt broker.
* [NOD-380] Fix a comment.
* [NOD-380] Removed unnecessary option.
* [NOD-380] Added comments to MQTT functions.
* [NOD-380] Fix copy+paste error.
* [NOD-380] Make it so that all the mqtt flags must be passed together.
* [NOD-380] Use activeConfig instead of passing it everywhere.
* [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
* [NOD-327] Add --migrate cli flag to API server
* [NOD-327] Change log messages
* [NOD-327] Remove `required` flag from API server RPC CLI arguments
* [NOD-327] Add database version in migrations logs
* [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-322] Use http package const + message for StatusInternalServerError
* [NOD-303] Implement get transaction by id for api server
* [NOD-303] Make routeParamTxID a constant
* [NOD-303] Change database is not current error.
* [NOD-303] Add ID to TransactionInput and TransactionOutput models
* [NOD-303] Change transactions_outputs table name to transaction_outputs and transactions_inputs to transaction_inputs
* [NOD-303] Add json annotations to transaction response types
* [NOD-303] Split server package
* [NOD-303] Add GetTransactionByHashHandler
* [NOD-303] Add comments to exported functions and variables
* [NOD-303] Put response types in a separate file
* [NOD-303] Rename functions
