build: refactor build system (#8324)

packages/proxy-container/package.json

@@ -3,14 +3,14 @@
 	"version": "0.1.0",
 	"description": "Lightweight HTTP proxy for Discord's API, brought to you as a container 📦",
 	"scripts": {
-		"build": "tsup",
+		"build": "unbuild",
 		"lint": "prettier --check . && eslint src --ext mjs,js,ts",
 		"format": "prettier --write . && eslint src --ext mjs,js,ts --fix",
 		"fmt": "yarn format",
 		"prepack": "yarn build && yarn lint",
 		"changelog": "git cliff --prepend ./CHANGELOG.md -u -c ./cliff.toml -r ../../ --include-path 'packages/proxy-container/*'"
 	},
-	"main": "./dist/index.js",
+	"main": "./dist/index.mjs",
 	"type": "module",
 	"directories": {
 		"lib": "src"
@@ -52,8 +52,10 @@
 		"@types/node": "^16.11.45",
 		"eslint": "^8.20.0",
 		"prettier": "^2.7.1",
+		"rollup-plugin-typescript2": "0.32.1",
 		"tsup": "^6.1.3",
-		"typescript": "^4.7.4"
+		"typescript": "^4.7.4",
+		"unbuild": "^0.7.4"
 	},
 	"engines": {
 		"node": ">=16.9.0"