feat: add environment configuration support

- Introduced .env.example file to provide a template for environment variables.
- Updated .gitignore to exclude .env files from version control.
- Implemented loadEnvFile function in client.ts to load environment variables from a .env file into process.env, enhancing configuration management.

.env.example

@@ -0,0 +1,2 @@
+DOKPLOY_URL=""
+DOKPLOY_API_KEY=""

.gitignore

@@ -11,5 +11,4 @@ oclif.manifest.json
 
 yarn.lock
 package-lock.json
-
+.env
-

src/client.ts

@@ -13,7 +13,27 @@ export interface AuthConfig {
 	url: string;
 }
 
+function loadEnvFile(): void {
+	const envPath = path.resolve(process.cwd(), ".env");
+	if (!fs.existsSync(envPath)) return;
+
+	const content = fs.readFileSync(envPath, "utf8");
+	for (const line of content.split("\n")) {
+		const trimmed = line.trim();
+		if (!trimmed || trimmed.startsWith("#")) continue;
+		const eqIndex = trimmed.indexOf("=");
+		if (eqIndex === -1) continue;
+		const key = trimmed.slice(0, eqIndex).trim();
+		const value = trimmed.slice(eqIndex + 1).trim().replace(/^["']|["']$/g, "");
+		if (!process.env[key]) {
+			process.env[key] = value;
+		}
+	}
+}
+
 export function readAuthConfig(): AuthConfig {
+	loadEnvFile();
+
 	const envToken =
 		process.env.DOKPLOY_API_KEY ?? process.env.DOKPLOY_AUTH_TOKEN;
 	const envUrl = process.env.DOKPLOY_URL;