feat(imageversion): config based image conversion

See merge request !24

refactor(server): move connectToFileStorage call to app.js

See merge request !37

feat(server): expose model types

See merge request !36

fix(server): use Model instead of base model for useTransaction

See merge request !35

Cors

See merge request !34

fix(server): wrap connect to filestorage in a function

See merge request !33

Start server

See merge request !32

Microservice call

See merge request !31

fix(server): throw when fileStorage configuration missing

See merge request !23

fix(middleware): fix permissions config circular dependency

See merge request !22

Fix circular dependency

Closes #15

See merge request !21

feat(*): object storage and service handshake

See merge request !19

chore(server): pubsweet-server updated

See merge request !18