Custom Linter to Check DEBUG_MODE (#1183)

* Added debug_mode check

* Changed pre-commit hook

* Changed pre-commit hook

* Fixing error

* Fixed DCF tests (Sorry Didier)

* Removed the br thingy

* Dider changes

custom_pre_commit/debug_mode.py

@@ -0,0 +1,34 @@
+""" Check debug mode """
+__docformat__ = "numpy"
+
+import sys
+import os
+from typing import List
+
+
+def search(lst: List[str], search_item: str):
+    for _, val in enumerate(lst):
+        if search_item in val:
+            return val
+    return None
+
+
+def main():
+    path = os.path.join(
+        os.path.dirname(os.path.dirname(__file__)),
+        "gamestonk_terminal",
+        "config_terminal.py",
+    )
+    with open(path) as file:
+        lines = file.readlines()
+        lines = [line.rstrip() for line in lines]
+
+    debug_line = search(lines, "DEBUG_MODE")
+
+    if debug_line == "DEBUG_MODE = False":
+        sys.exit(0)
+    sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()