feat: custom branding (#112)

* add first concept

* remove setup status

* split config page in multiple components

* add custom branding docs

* add test email button

* fix invalid email from header

* add migration

* mount images to host

* update docs

* remove unused endpoint

* run formatter

backend/src/reverseShare/reverseShare.service.ts

@@ -24,7 +24,7 @@ export class ReverseShareService {
       )
       .toDate();
 
-    const globalMaxShareSize = this.config.get("MAX_SHARE_SIZE");
+    const globalMaxShareSize = this.config.get("share.maxSize");
 
     if (globalMaxShareSize < data.maxShareSize)
       throw new BadRequestException(