feat: initial prototype (#6)

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Reviewed-on: #6
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

prisma/schema.prisma

@@ -0,0 +1,21 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+    provider = "prisma-client-js"
+}
+
+datasource db {
+    provider = "mongodb"
+    url      = env("MONGO_URI")
+}
+
+model Highlights {
+    id        String   @id @default(auto()) @map("_id") @db.ObjectId
+    serverId  String
+    userId String
+    words  String[]
+
+    @@unique([serverId, userId], map: "serverId_userId")
+    @@index([serverId], map: "serverId")
+}