diff --git a/source/routes/problems/slowImage.ts b/source/routes/problems/slowImage.ts
index 717f35d..63e60dd 100644
--- a/source/routes/problems/slowImage.ts
+++ b/source/routes/problems/slowImage.ts
@@ -1,11 +1,11 @@
-import type { FastifyPluginAsync } from 'fastify';
-import { performance } from 'node:perf_hooks';
-import { slowImageGeneration } from '~/simulate/load.ts';
+import type { FastifyPluginAsync } from 'fastify'
+import { performance } from 'node:perf_hooks'
+import { slowImageGeneration } from '~/simulate/load.ts'
 
 // eslint-disable-next-line jsdoc/require-jsdoc
 export const slowImage: FastifyPluginAsync = async (fastify) => {
-  fastify.get<{ Querystring: { complexity: string, name: string } }>('/problems/slow-image', async (request, reply) => {
-    const complexity = parseInt(request.query.complexity || '1', 10)
+  fastify.get<{ Querystring: { complexity: string; name: string } }>('/problems/slow-image', async (request, reply) => {
+    const complexity = Number.parseInt(request.query.complexity || '1', 10)
     const name = request.query.name || 'default'
 
     const startTime = performance.now()
diff --git a/source/routes/problems/slowImageGallery.ts b/source/routes/problems/slowImageGallery.ts
index 6f73417..1f0a84d 100644
--- a/source/routes/problems/slowImageGallery.ts
+++ b/source/routes/problems/slowImageGallery.ts
@@ -3,6 +3,20 @@ import type { FastifyPluginAsync } from 'fastify'
 // eslint-disable-next-line jsdoc/require-jsdoc
 export const imageGalleryRoute: FastifyPluginAsync = async (fastify) => {
   fastify.get('/problems/slow-image-gallery', async (_, reply) => {
+    const imageContainer = (i: number): string => {
+      return `
+            <div class="image-container">
+              <div class="loading">Loading...</div>
+              <img src="/problems/slow-image?complexity=${i}" alt="Slow image ${i}" loading="lazy" onload="this.previousElementSibling.style.display='none';">
+            </div>
+          `
+    }
+
+    const gallery = Array.from({ length: 9 })
+      .map((_, i) => i + 1)
+      .map((i) => imageContainer(i))
+      .join('')
+
     const html = `
       <!DOCTYPE html>
       <html lang="en">
@@ -21,12 +35,7 @@ export const imageGalleryRoute: FastifyPluginAsync = async (fastify) => {
       <body>
         <h1>Slow Loading Image Gallery</h1>
         <div class="gallery">
-          ${ Array.from({length: 9}).map((_, i) => i + 1).map(i => `
-            <div class="image-container">
-              <div class="loading">Loading...</div>
-              <img src="/problems/slow-image?complexity=${i}" alt="Slow image ${i}" loading="lazy" onload="this.previousElementSibling.style.display='none';">
-            </div>
-          `).join('')}
+          ${gallery}
         </div>
         <script>
           document.addEventListener('DOMContentLoaded', () => {
diff --git a/source/server.ts b/source/server.ts
index 98bd3ff..3dfe86d 100644
--- a/source/server.ts
+++ b/source/server.ts
@@ -7,9 +7,7 @@ import routes from './routes/index.ts'
 const DEFAULT_PORT = 3000
 const DEFAULT_HOST = '127.0.0.1'
 
-// biome-ignore lint/complexity/useLiteralKeys: tsc > biome
 const PORT = Number.parseInt(process.env['PORT'] || DEFAULT_PORT.toString(), 10)
-// biome-ignore lint/complexity/useLiteralKeys: tsc > biome
 const HOST = process.env['HOST'] || DEFAULT_HOST
 
 const server = fastify()
diff --git a/source/simulate/load.ts b/source/simulate/load.ts
index fc75aec..4db307c 100644
--- a/source/simulate/load.ts
+++ b/source/simulate/load.ts
@@ -83,8 +83,8 @@ export const slowImageGeneration = async (
         ctx.fillStyle = `#${hash.slice(i * 6, (i + 1) * 6)}`
         ctx.beginPath()
         ctx.arc(
-          parseInt(hash.slice(i * 2, i * 2 + 2), 16) * 300 / 255,
-          parseInt(hash.slice(i * 2 + 2, i * 2 + 4), 16) * 300 / 255,
+          (Number.parseInt(hash.slice(i * 2, i * 2 + 2), 16) * 300) / 255,
+          (Number.parseInt(hash.slice(i * 2 + 2, i * 2 + 4), 16) * 300) / 255,
           20 + i * 10,
           0,
           Math.PI * 2
diff --git a/tsconfig.build.json b/tsconfig.build.json
index 3a27d4d..79001a5 100644
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -1,6 +1,7 @@
 {
   "extends": "./tsconfig.json",
-  "exclude": ["build", "**/*.test.ts", "vitest.config.ts"],
+  "include": ["source/**/*"],
+  "exclude": ["**/*.test.ts"],
   "tsc-alias": {
     "verbose": true,
     "resolveFullPaths": true
diff --git a/tsconfig.json b/tsconfig.json
index 5111dc9..80874cd 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,5 +1,6 @@
 {
   "extends": "@2bad/tsconfig",
+  "include": ["source/**/*", "vitest.config.ts"],
   "compilerOptions": {
     "outDir": "build",
     "baseUrl": "source",
