added expo template example (#67)

Author: mishushakov

docs/template/examples/expo.mdx

@@ -0,0 +1,68 @@
+---
+title: "Expo App"
+description: "Expo web app running in the sandbox using Node.js"
+---
+
+Basic Expo app.
+
+<Note>
+    The development server runs on port 8081 as soon as the sandbox is ready.
+</Note>
+
+<CodeGroup>
+```typescript JavaScript & TypeScript
+// template.ts
+import { defaultBuildLogger, waitForURL } from "e2b";
+
+export const template = Template()
+  .fromNodeImage()
+  .setWorkdir("/home/user/expo-app")
+  .runCmd("npx create-expo-app@latest . --yes")
+  .runCmd("mv /home/user/expo-app/* /home/user/ && rm -rf /home/user/expo-app")
+  .setWorkdir("/home/user")
+  .setStartCmd("npx expo start", waitForURL("http://localhost:8081"));
+```
+
+```python Python
+# template.py
+from e2b import Template, wait_for_url
+
+template = (
+    Template()
+    .from_node_image()
+    .set_workdir("/home/user/expo-app")
+    .run_cmd("npx create-expo-app@latest . --yes")
+    .run_cmd("mv /home/user/expo-app/* /home/user/ && rm -rf /home/user/expo-app")
+    .set_workdir("/home/user")
+    .set_start_cmd("npx expo start", wait_for_url('http://localhost:8081'))
+)
+```
+</CodeGroup>
+
+<CodeGroup>
+```typescript JavaScript & TypeScript
+// build.ts
+import { Template, defaultBuildLogger } from 'e2b'
+import { template as expoTemplate } from './template'
+
+Template.build(expoTemplate, {
+  alias: 'expo-app',
+  cpuCount: 4,
+  memoryMB: 8192,
+  onBuildLogs: defaultBuildLogger(),
+})
+```
+
+```python Python
+# build.py
+from e2b import Template, default_build_logger
+from .template import template as expoTemplate
+
+Template.build(expoTemplate,
+    alias="expo-app",
+    cpu_count=4,
+    memory_mb=8192,
+    on_build_logs=default_build_logger(),
+)
+```
+</CodeGroup>

docs/template/examples/nextjs.mdx

@@ -12,7 +12,7 @@ Basic Next.js app with Tailwind and shadcn UI
 <CodeGroup>
 ```typescript JavaScript & TypeScript
 // template.ts
-import { Template, waitForPort } from 'e2b'
+import { Template, waitForURL } from 'e2b'
 
 export const template = Template()
   .fromNodeImage('21-slim')