Allow to set Giskard key from env

app.py

@@ -6,6 +6,8 @@ import subprocess
 import threading
 
 import sys
+import os
+
 
 LOG_FILE = "output.log"
 
@@ -55,6 +57,9 @@ def stop_ml_worker():
 
 
 def start_ml_worker(url, api_key, hf_token):
+    if not url or len(url) < 1:
+        return "Please provide URL of Giskard"
+
     # Always run an external ML worker
     stop_ml_worker()
 
@@ -71,7 +76,11 @@ with gr.Blocks(theme=theme) as iface:
     with gr.Row():
         with gr.Column():
             url_input = gr.Textbox(label="Giskard Hub URL")
-            api_key_input = gr.Textbox(label="Giskard Hub API Key", placeholder="gsk-xxxxxxxxxxxxxxxxxxxxxxxxxxxx")
+            api_key_input = gr.Textbox(
+                label="Giskard Hub API Key",
+                value=os.environ.get("GSK_API_KEY"),
+                placeholder="gsk-xxxxxxxxxxxxxxxxxxxxxxxxxxxx",
+            )
             hf_token_input = gr.Textbox(label="Hugging Face Spaces Token")
 
         output = gr.Textbox(label="Status")