Add container build for deployment

Standalone Next output, migration script run on start, storage volume
at /app/storage, port 4700. Database connection is created lazily so
the image builds without a database.

src/data/db.ts

@@ -2,13 +2,41 @@ import { drizzle } from 'drizzle-orm/node-postgres'
 import { Pool } from 'pg'
 import * as schema from './schema'
 
-const isTest = process.env.VITEST === 'true' || process.env.NODE_ENV === 'test'
-const url = isTest ? process.env.DATABASE_URL_TEST : process.env.DATABASE_URL
+type Client = ReturnType<typeof drizzle<typeof schema>>
 
-if (!url) {
-	throw new Error(isTest ? 'DATABASE_URL_TEST is not set' : 'DATABASE_URL is not set')
+let connection: { pool: Pool, db: Client } | undefined
+
+function connectionUrl(): string {
+	const isTest = process.env.VITEST === 'true' || process.env.NODE_ENV === 'test'
+	const url = isTest ? process.env.DATABASE_URL_TEST : process.env.DATABASE_URL
+
+	if (!url) {
+		throw new Error(isTest ? 'DATABASE_URL_TEST is not set' : 'DATABASE_URL is not set')
+	}
+
+	return url
 }
 
-export const pool = new Pool({ connectionString: url })
-export const db = drizzle(pool, { schema })
-export type Db = typeof db
+function connect(): { pool: Pool, db: Client } {
+	if (!connection) {
+		const pool = new Pool({ connectionString: connectionUrl() })
+
+		connection = { pool, db: drizzle(pool, { schema }) }
+	}
+
+	return connection
+}
+
+export const pool = new Proxy({} as Pool, {
+	get(_target, property) {
+		return Reflect.get(connect().pool, property, connect().pool)
+	},
+})
+
+export const db = new Proxy({} as Client, {
+	get(_target, property) {
+		return Reflect.get(connect().db, property, connect().db)
+	},
+})
+
+export type Db = Client