Run web API test suite in GitHub Actions (#1009)

- Fixed ignore patterns in .dockerignore
- Added healthchecks to backend and web containers
- Reduced Docker image sizes
- Removed RaSCSI references in various areas (e.g. rascsi -> backend)
- Added compilation-only step to easyinstall.sh
- Moved apt package lists to variables
- Revert to triggering GitHub Actions runs on push
- Updated web/frontend_checks workflow to run black and flake8 against all Python sources
- Capture log files from backend/web containers
- Fix None to float conversion bug when user agent is absent or unrecognised

python/web/src/web_utils.py

@@ -324,10 +324,17 @@ def browser_supports_modern_themes():
     ]
 
     current_ua_family = user_agent["user_agent"]["family"]
-    current_ua_version = float(user_agent["user_agent"]["major"])
+    current_ua_version = user_agent["user_agent"]["major"]
     logging.info(f"Identified browser as family={current_ua_family}, version={current_ua_version}")
 
+    # Supported browsers cannot be identified without a version
+    if not current_ua_version:
+        return False
+
     for supported_browser, supported_version in supported_browsers:
-        if current_ua_family == supported_browser and current_ua_version >= supported_version:
+        if (
+            current_ua_family == supported_browser
+            and float(current_ua_version) >= supported_version
+        ):
             return True
     return False