chore(preview-server): cleanup dependencies, move most to devDependencies (#2473)

Co-authored-by: gabriel miranda <gabrielmfern@outlook.com>

Author: hillac

.changeset/lovely-swans-glow.md

@@ -0,0 +1,5 @@
+---
+"@react-email/preview-server": patch
+---
+
+move most dependenices to devDependencies

packages/preview-server/package.json

@@ -13,6 +13,9 @@
   },
   "main": "./index.mjs",
   "dependencies": {
+    "next": "16.0.1"
+  },
+  "devDependencies": {
     "@babel/core": "7.26.10",
     "@babel/parser": "7.27.0",
     "@babel/traverse": "7.27.0",
@@ -26,7 +29,13 @@
     "@radix-ui/react-toggle": "1.1.10",
     "@radix-ui/react-toggle-group": "1.1.11",
     "@radix-ui/react-tooltip": "1.2.8",
+    "@react-email/components": "workspace:*",
     "@react-email/tailwind": "workspace:2.0.0",
+    "@types/babel__core": "7.20.5",
+    "@types/babel__traverse": "7.20.7",
+    "@types/css-tree": "2.3.10",
+    "@types/fs-extra": "11.0.1",
+    "@types/mime-types": "2.1.4",
     "@types/node": "22.14.1",
     "@types/normalize-path": "3.0.2",
     "@types/react": "19.0.10",
@@ -37,13 +46,12 @@
     "colorjs.io": "0.5.2",
     "esbuild": "0.25.10",
     "framer-motion": "12.23.22",
-    "json5": "2.2.3",
     "log-symbols": "4.1.0",
     "module-punycode": "npm:punycode@2.3.1",
-    "next": "16.0.1",
     "next-safe-action": "8.0.11",
     "node-html-parser": "7.0.1",
     "ora": "5.4.1",
+    "postcss": "8.5.3",
     "pretty-bytes": "6.1.1",
     "prism-react-renderer": "2.4.1",
     "react": "19.0.0",
@@ -53,29 +61,13 @@
     "socket.io-client": "4.8.1",
     "sonner": "2.0.3",
     "source-map-js": "1.2.1",
-    "spamc": "0.0.5",
     "stacktrace-parser": "0.1.11",
     "tailwind-merge": "3.2.0",
     "tailwindcss": "3.4.0",
+    "typescript": "5.8.3",
     "use-debounce": "10.0.4",
     "zod": "4.1.12"
   },
-  "devDependencies": {
-    "@react-email/components": "workspace:*",
-    "@types/babel__core": "7.20.5",
-    "@types/babel__traverse": "7.20.7",
-    "@types/css-tree": "2.3.10",
-    "@types/fs-extra": "11.0.1",
-    "@types/mime-types": "2.1.4",
-    "@types/node": "22.10.2",
-    "@types/normalize-path": "3.0.2",
-    "@types/react": "19.0.10",
-    "@types/react-dom": "19.0.4",
-    "@types/webpack": "5.28.5",
-    "autoprefixer": "10.4.21",
-    "tailwindcss": "3.4.0",
-    "typescript": "5.8.3"
-  },
   "license": "MIT",
   "repository": {
     "type": "git",

packages/react-email/src/commands/build.ts

@@ -198,9 +198,9 @@ const updatePackageJson = async (builtPreviewAppPath: string) => {
   packageJson.name = 'preview-server';
 
   for (const [dependency, version] of Object.entries(
-    packageJson.dependencies,
+    packageJson.devDependencies,
   )) {
-    packageJson.dependencies[dependency] = version.replace('workspace:', '');
+    packageJson.devDependencies[dependency] = version.replace('workspace:', '');
   }
 
   delete packageJson.devDependencies['@react-email/components'];