chore: remove unused historic image files

find_lists_no_space.py

@@ -0,0 +1,34 @@
+import os
+import re
+
+count = 0
+for root, _, files in os.walk("/Users/baohua/Github/books/docker_practice"):
+    if ".git" in root or "node_modules" in root: continue
+    for f in files:
+        if f.endswith(".md"):
+            path = os.path.join(root, f)
+            try:
+                with open(path, "r", encoding="utf-8") as file:
+                    lines = file.readlines()
+            except Exception:
+                continue
+                
+            in_code_block = False
+            for i, line in enumerate(lines):
+                if line.strip().startswith("```"):
+                    in_code_block = not in_code_block
+                    continue
+                
+                if not in_code_block:
+                    # Look for lines starting with space(s) and a single dash, followed by word char, * or _
+                    # skip html comment '<!--' or horizontal rule '---' or yaml '---'
+                    m = re.match(r'^(\s*)-([*_\w\u4e00-\u9fa5].*)$', line)
+                    if m:
+                        print(f"{path}:{i+1}:{line.rstrip()}")
+                        count += 1
+                        if count > 50:
+                            print("More than 50 found. Stopping.")
+                            import sys
+                            sys.exit(0)
+
+print(f"Total outside code blocks: {count}")