add env config, and create base schema for prisma

.env.example

@@ -0,0 +1 @@
+DATABASE_URL='<database_url>'

.gitignore

@@ -25,3 +25,4 @@ dist-ssr
 
 *.sqlite
 *.db
+.env

prisma/schema.prisma

@@ -0,0 +1,36 @@
+generator client {
+  provider        = "prisma-client-js"
+  previewFeatures = ["referentialIntegrity"]
+}
+
+datasource db {
+  provider             = "mysql"
+  url                  = env("DATABASE_URL")
+  referentialIntegrity = "prisma"
+}
+
+model User {
+  id        Int    @id @default(autoincrement())
+  firstname String
+  lastname  String
+  email     String
+  password  String
+  posts     Post[]
+  roleId    Int
+  Role      Role   @relation(fields: [roleId], references: [id])
+}
+
+model Role {
+  id    Int    @id @default(autoincrement())
+  name  String
+  users User[]
+}
+
+model Post {
+  id       Int    @id @default(autoincrement())
+  title    String
+  content  String
+  image    String
+  authorId Int
+  author   User   @relation(fields: [authorId], references: [id])
+}