feat: upload module (#486)

* feat: wip upload module

* feat: local storage and serve local images

* feat: protect against injections

* feat: server local and s3 files

* fix: use storage location when serving local files

* feat: cross field env validation

server/src/integrations/local-storage/local-storage.module.ts

@@ -0,0 +1,10 @@
+import { Global, Module } from '@nestjs/common';
+import { LocalStorageService } from './local-storage.service';
+import { ConfigurableModuleClass } from './local-storage.module-definition';
+
+@Global()
+@Module({
+  providers: [LocalStorageService],
+  exports: [LocalStorageService],
+})
+export class LocalStorageModule extends ConfigurableModuleClass {}