Optimize docker image size (#91)

* Move prisma to runtime dependencies

* Optimize Dockerfile and build script

* Fix: remove mention of generated next-env.d.ts in Dockerfile

* Add missing reset.d.ts file to Dockerfile

* Remove compression steps from Dockerfile and entrypoint script

* Add an env file with mocked env vars added for Docker production builds

* Use server actions to get runtime env vars

* Refactor types and names

* Rollback serverActions, use parsed Zod object for runtime env

* Reintroduce featureFlags object to avoid passing secret envs to the frontend

* Improve string to boolean coercion

Co-authored-by: Sebastien Castiel <sebastien@castiel.me>

* Run prettier autoformat

* Fix type issue, rename function to match behaviour better

---------

Co-authored-by: Lauri Vuorela <lauri.vuorela@gmail.com>
Co-authored-by: Sebastien Castiel <sebastien@castiel.me>

src/lib/env.ts

@@ -1,5 +1,10 @@
 import { ZodIssueCode, z } from 'zod'
 
+const interpretEnvVarAsBool = (val: unknown): boolean => {
+  if (typeof val !== 'string') return false
+  return ['true', 'yes', '1', 'on'].includes(val.toLowerCase())
+}
+
 const envSchema = z
   .object({
     POSTGRES_URL_NON_POOLING: z.string().url(),
@@ -12,14 +17,23 @@ const envSchema = z
           ? `https://${process.env.VERCEL_URL}`
           : 'http://localhost:3000',
       ),
-    NEXT_PUBLIC_ENABLE_EXPENSE_DOCUMENTS: z.coerce.boolean().default(false),
+    NEXT_PUBLIC_ENABLE_EXPENSE_DOCUMENTS: z.preprocess(
+      interpretEnvVarAsBool,
+      z.boolean().default(false),
+    ),
     S3_UPLOAD_KEY: z.string().optional(),
     S3_UPLOAD_SECRET: z.string().optional(),
     S3_UPLOAD_BUCKET: z.string().optional(),
     S3_UPLOAD_REGION: z.string().optional(),
     S3_UPLOAD_ENDPOINT: z.string().optional(),
-    NEXT_PUBLIC_ENABLE_RECEIPT_EXTRACT: z.coerce.boolean().default(false),
-    NEXT_PUBLIC_ENABLE_CATEGORY_EXTRACT: z.coerce.boolean().default(false),
+    NEXT_PUBLIC_ENABLE_RECEIPT_EXTRACT: z.preprocess(
+      interpretEnvVarAsBool,
+      z.boolean().default(false),
+    ),
+    NEXT_PUBLIC_ENABLE_CATEGORY_EXTRACT: z.preprocess(
+      interpretEnvVarAsBool,
+      z.boolean().default(false),
+    ),
     OPENAI_API_KEY: z.string().optional(),
   })
   .superRefine((env, ctx) => {

src/lib/featureFlags.ts

@@ -0,0 +1,15 @@
+'use server'
+
+import { env } from './env'
+
+export async function getRuntimeFeatureFlags() {
+  return {
+    enableExpenseDocuments: env.NEXT_PUBLIC_ENABLE_EXPENSE_DOCUMENTS,
+    enableReceiptExtract: env.NEXT_PUBLIC_ENABLE_RECEIPT_EXTRACT,
+    enableCategoryExtract: env.NEXT_PUBLIC_ENABLE_CATEGORY_EXTRACT,
+  }
+}
+
+export type RuntimeFeatureFlags = Awaited<
+  ReturnType<typeof getRuntimeFeatureFlags>
+>