feat: add ClamAV to scan for malicious files

backend/prisma/migrations/20230113080918_removed_reason_attribute/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Share" ADD COLUMN "removedReason" TEXT;

backend/prisma/schema.prisma

@@ -52,11 +52,12 @@ model Share {
   id        String   @id @default(uuid())
   createdAt DateTime @default(now())
 
-  uploadLocked Boolean  @default(false)
-  isZipReady   Boolean  @default(false)
-  views        Int      @default(0)
-  expiration   DateTime
-  description  String?
+  uploadLocked  Boolean  @default(false)
+  isZipReady    Boolean  @default(false)
+  views         Int      @default(0)
+  expiration    DateTime
+  description   String?
+  removedReason String?
 
   creatorId  String?
   creator    User?            @relation(fields: [creatorId], references: [id], onDelete: Cascade)