Fix docker check. #840

terrariumUtils.py

@@ -488,4 +488,13 @@ def get_translator(lang="en-US"):
     @staticmethod
     def is_docker():
         path = "/proc/self/cgroup"
-        return os.path.exists("/.dockerenv") or os.path.isfile(path) and any("docker" in line for line in open(path))
+        if os.path.exists("/.dockerenv"):
+            return True
+
+        if os.path.isfile(path):
+            with open(path, "r") as file:
+                contents = file.read()
+
+            return "docker" in contents
+
+        return False