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>

5 files changed, 41 insertions, 5 deletions

diff --git a/src/app/groups/[groupId]/expenses/[expenseId]/edit/page.tsx b/src/app/groups/[groupId]/expenses/[expenseId]/edit/page.tsx
index 65b2b50..2514a77 100644
--- a/src/app/groups/[groupId]/expenses/[expenseId]/edit/page.tsx
+++ b/src/app/groups/[groupId]/expenses/[expenseId]/edit/page.tsx
@@ -6,6 +6,7 @@ import {
   getExpense,
   updateExpense,
 } from '@/lib/api'
+import { getRuntimeFeatureFlags } from '@/lib/featureFlags'
 import { expenseFormSchema } from '@/lib/schemas'
 import { Metadata } from 'next'
 import { notFound, redirect } from 'next/navigation'
@@ -47,6 +48,7 @@ export default async function EditExpensePage({
         categories={categories}
         onSubmit={updateExpenseAction}
         onDelete={deleteExpenseAction}
+        runtimeFeatureFlags={await getRuntimeFeatureFlags()}
       />
     </Suspense>
   )
diff --git a/src/app/groups/[groupId]/expenses/create/page.tsx b/src/app/groups/[groupId]/expenses/create/page.tsx
index 2d580d3..6398fd1 100644
--- a/src/app/groups/[groupId]/expenses/create/page.tsx
+++ b/src/app/groups/[groupId]/expenses/create/page.tsx
@@ -1,6 +1,7 @@
 import { cached } from '@/app/cached-functions'
 import { ExpenseForm } from '@/components/expense-form'
 import { createExpense, getCategories } from '@/lib/api'
+import { getRuntimeFeatureFlags } from '@/lib/featureFlags'
 import { expenseFormSchema } from '@/lib/schemas'
 import { Metadata } from 'next'
 import { notFound, redirect } from 'next/navigation'
@@ -32,6 +33,7 @@ export default async function ExpensePage({
         group={group}
         categories={categories}
         onSubmit={createExpenseAction}
+        runtimeFeatureFlags={await getRuntimeFeatureFlags()}
       />
     </Suspense>
   )
diff --git a/src/components/expense-form.tsx b/src/components/expense-form.tsx
index fd3f6e2..a7e549c 100644
--- a/src/components/expense-form.tsx
+++ b/src/components/expense-form.tsx
@@ -35,6 +35,7 @@ import {
   SelectValue,
 } from '@/components/ui/select'
 import { getCategories, getExpense, getGroup, randomId } from '@/lib/api'
+import { RuntimeFeatureFlags } from '@/lib/featureFlags'
 import { ExpenseFormValues, expenseFormSchema } from '@/lib/schemas'
 import { cn } from '@/lib/utils'
 import { zodResolver } from '@hookform/resolvers/zod'
@@ -52,6 +53,7 @@ export type Props = {
   categories: NonNullable<Awaited<ReturnType<typeof getCategories>>>
   onSubmit: (values: ExpenseFormValues) => Promise<void>
   onDelete?: () => Promise<void>
+  runtimeFeatureFlags: RuntimeFeatureFlags
 }
 
 export function ExpenseForm({
@@ -60,6 +62,7 @@ export function ExpenseForm({
   categories,
   onSubmit,
   onDelete,
+  runtimeFeatureFlags,
 }: Props) {
   const isCreate = expense === undefined
   const searchParams = useSearchParams()
@@ -161,7 +164,7 @@ export function ExpenseForm({
                       {...field}
                       onBlur={async () => {
                         field.onBlur() // avoid skipping other blur event listeners since we overwrite `field`
-                        if (process.env.NEXT_PUBLIC_ENABLE_CATEGORY_EXTRACT) {
+                        if (runtimeFeatureFlags.enableCategoryExtract) {
                           setCategoryLoading(true)
                           const { categoryId } = await extractCategoryFromTitle(
                             field.value,
@@ -541,7 +544,7 @@ export function ExpenseForm({
           </CardContent>
         </Card>
 
-        {process.env.NEXT_PUBLIC_ENABLE_EXPENSE_DOCUMENTS && (
+        {runtimeFeatureFlags.enableExpenseDocuments && (
           <Card className="mt-4">
             <CardHeader>
               <CardTitle className="flex justify-between">
diff --git a/src/lib/env.ts b/src/lib/env.ts
index 927e756..920df14 100644
--- a/src/lib/env.ts
+++ b/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) => {
diff --git a/src/lib/featureFlags.ts b/src/lib/featureFlags.ts
new file mode 100644
index 0000000..e57ca9c
--- /dev/null
+++ b/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>
+>