feat: implement Docker support with entrypoint script and environment configuration for data directory

backend/package.json

@@ -7,7 +7,10 @@
     "dev": "nodemon server.js",
     "start": "node server.js",
     "prisma:generate": "prisma generate",
-    "prisma:migrate": "prisma migrate dev --name init"
+    "prisma:migrate-dev": "prisma migrate dev --name init",
+    "prisma:migrate-deploy": "prisma migrate deploy",
+    "prisma:studio": "prisma studio",
+    "prisma:deploy": "npx prisma migrate deploy && npx prisma generate"
   },
   "dependencies": {
     "@prisma/client": "^6.19.0",

backend/prisma/schema.prisma

@@ -1,6 +1,6 @@
 datasource db {
     provider = "sqlite"
-    url      = "file:../data/sqlite.db"
+    url      = env("DATABASE_URL")
 }
 
 generator client {

backend/server.js

@@ -5,8 +5,6 @@ const path = require('path')
 const cors = require('cors')
 const { PrismaClient } = require('@prisma/client')
 
-const prisma = new PrismaClient()
-
 // small, configurable logger used across the app
 const LOG_LEVEL = (process.env.LOG_LEVEL || 'info').toLowerCase() // 'error'|'info'|'debug'
 const levels = { error: 0, info: 1, debug: 2 }
@@ -22,7 +20,7 @@ const log = {
   },
 }
 
-// store all runtime data under backend/data
+// store runtime data under DATA_DIR env if provided, else backend/data
 const DATA_DIR = process.env.DATA_DIR
   ? path.resolve(process.env.DATA_DIR)
   : path.join(__dirname, 'data')
@@ -33,6 +31,14 @@ const UPLOAD_DIR = path.join(DATA_DIR, 'uploads')
 if (!fs.existsSync(DATA_DIR)) fs.mkdirSync(DATA_DIR, { recursive: true })
 if (!fs.existsSync(UPLOAD_DIR)) fs.mkdirSync(UPLOAD_DIR, { recursive: true })
 
+// ensure DATABASE_URL points to the DB under DATA_DIR for Prisma at runtime
+if (!process.env.DATABASE_URL) {
+  process.env.DATABASE_URL = `file:${path.join(DATA_DIR, 'sqlite.db')}`
+}
+
+// instantiate Prisma client AFTER DATA_DIR / DATABASE_URL are ready
+const prisma = new PrismaClient()
+
 const upload = multer({ dest: UPLOAD_DIR }) // local storage for uploads
 
 const app = express()