🛠️ Add nixpacks configuration for PNPM setup and build process

nixpacks.toml

@@ -0,0 +1,20 @@
+[variables]
+NODE_VERSION = "22.17.0"
+PNPM_VERSION = "10.13.1"
+
+[providers.node]
+version = "22.17.0"
+
+[phases.setup]
+cmds = ["npm install -g pnpm@10.13.1"]
+
+[phases.install]
+cmds = ["pnpm install --frozen-lockfile"]
+
+[phases.build]
+# Build command using PNPM
+cmds = ["pnpm run build"]
+
+[start]
+# Start command using PNPM
+cmd = "node build"