update env sample and remove dependencies from app

app.py

@@ -14,11 +14,9 @@ from google.cloud import aiplatform
 import vertexai
 from vertexai.preview.vision_models import ImageGenerationModel
 from vertexai import preview
-import uuid #for generating unique filenames
 
 # GCP credentials stuff
 import json
-import tempfile
 import pybase64
 from google.oauth2 import service_account
 import google.auth

env-sample

@@ -1 +1 @@
-GOOGLE_APPLICATION_CREDENTIALS= <YOUR_GOOGLE_APPLICATION_CREDENTIALS>
+IMAGEN=<YOUR_IMAGEN_BASE64_ENCODED_API_KEY>