feat: remove appwrite and add nextjs backend

backend/src/share/dto/createShare.dto.ts

@@ -0,0 +1,18 @@
+import { Type } from "class-transformer";
+import { IsString, Matches, ValidateNested } from "class-validator";
+import { ShareSecurityDTO } from "./shareSecurity.dto";
+
+export class CreateShareDTO {
+  @IsString()
+  @Matches("^[a-zA-Z0-9_-]*$", undefined, {
+    message: "ID only can contain letters, numbers, underscores and hyphens",
+  })
+  id: string;
+
+  @IsString()
+  expiration: string;
+
+  @ValidateNested()
+  @Type(() => ShareSecurityDTO)
+  security: ShareSecurityDTO;
+}