Update app.py

app.py

@@ -14,14 +14,15 @@ from opyalpr import initSDK
 from opyalpr import processImage
 
 licenseKeyPath = "license.txt"
-license = ""
-
-try:
-    with open(licenseKeyPath, 'r') as file:
-        license = file.read().strip()
-except IOError as exc:
-    print("failed to open license.txt: ", exc.errno)
-print("License Key: ", license)
+license = os.environ.get("LICENSE_KEY")
+
+if license is None:
+    try:
+        with open(licenseKeyPath, 'r') as file:
+            license = file.read().strip()
+    except IOError as exc:
+        print("failed to open license.txt: ", exc.errno)
+    print("License Key: ", license)
 
 hwid = getHWID()
 print("HWID: ", hwid.decode('utf-8'))