removed auth dependency at build time

Dockerfile

@@ -1,7 +1,5 @@
 FROM oven/bun AS builder
 
-RUN bun
-
 WORKDIR /app
 COPY package.json bun.lock ./
 

src/lib/server/auth.ts

@@ -8,8 +8,8 @@ import * as schema from '$lib/server/db/schema';
 import type { RequestEvent } from '@sveltejs/kit';
 
 export const auth = betterAuth({
-	baseURL: env.ORIGIN,
-	secret: env.BETTER_AUTH_SECRET,
+	baseURL: env.ORIGIN ?? 'http://localhost:3000',
+	secret: env.BETTER_AUTH_SECRET ?? 'build-time-placeholder',
 	database: drizzleAdapter(db, { provider: 'pg', schema }),
 	emailAndPassword: { enabled: true },
 	socialProviders: {