Prisma (#2)

feat: added Prisma

prisma/schema.prisma

@@ -0,0 +1,17 @@
+// 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 = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+model Addition {
+  id String @id
+  datetime DateTime
+  value Int
+}