allow multiple image types

watcher.py

@@ -265,8 +265,13 @@ def build_storj_screenshot_urls(session: requests.Session, app_id: str) -> List[
         return []
 
     screenshot_urls: List[str] = []
+    image_extensions = ["png", "jpg", "jpeg", "webp"]
     for index in range(1, MAX_SCREENSHOTS_PER_APP + 1):
-        screenshot_url = f"{MEDIA_BASE_URL.rstrip('/')}/apps/{app_id}/screenshots/screenshot{index}.png"
+        matched_for_index = False
+        for extension in image_extensions:
+            screenshot_url = (
+                f"{MEDIA_BASE_URL.rstrip('/')}/apps/{app_id}/screenshots/screenshot{index}.{extension}"
+            )
             try:
                 response = session.get(
                     screenshot_url,
@@ -274,16 +279,21 @@ def build_storj_screenshot_urls(session: requests.Session, app_id: str) -> List[
                     headers={"User-Agent": USER_AGENT},
                 )
             except requests.RequestException:
-            break
+                continue
 
             if response.status_code != 200:
-            break
+                continue
 
             content_type = str(response.headers.get("Content-Type", "")).lower()
             if content_type and "image" not in content_type:
-            break
+                continue
 
             screenshot_urls.append(screenshot_url)
+            matched_for_index = True
+            break
+
+        if not matched_for_index:
+            break
 
     return screenshot_urls