diff --git a/Dockerfile b/Dockerfile
index 470b397..975bc7d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,8 +2,11 @@ FROM python:2.7-slim
WORKDIR /app
+# install dependencies (optional - bs4 can be skipped with --nobs)
+COPY requirements.txt .
+RUN pip install -r requirements.txt || true
+
COPY . .
-RUN pip install -r requirements.txt
-
-CMD ["python", "ppf.py"]
\ No newline at end of file
+# default: run syntax check
+CMD ["python", "-m", "py_compile", "ppf.py", "soup_parser.py", "config.py", "fetch.py"]
\ No newline at end of file
diff --git a/test_nobs.py b/test_nobs.py
new file mode 100644
index 0000000..2d169be
--- /dev/null
+++ b/test_nobs.py
@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""Test --nobs functionality (stdlib HTML parsing without BeautifulSoup)."""
+
+import sys
+
+OK = "[OK]"
+FAIL = "[FAIL]"
+
+# Test 1: Import soup_parser
+print("Test 1: Import soup_parser")
+try:
+ import soup_parser
+ print(" %s soup_parser imported" % OK)
+except Exception as e:
+ print(" %s Failed: %s" % (FAIL, e))
+ sys.exit(1)
+
+# Test 2: Check bs4 availability detection
+print("Test 2: Check bs4 availability")
+print(" bs4 available: %s" % soup_parser.is_available())
+
+# Test 3: Test stdlib parser (force --nobs mode)
+print("Test 3: Test stdlib parser")
+soup_parser.set_nobs(True)
+
+html = '''
+
+
+Link 1
+Link 2
+No href
+Not a link
+
+
+'''
+
+soup = soup_parser.soupify(html, nohtml=True)
+links = soup.find_all('a', href=True)
+
+print(" Found %d links with href" % len(links))
+if len(links) == 2:
+ print(" %s Correct count" % OK)
+else:
+ print(" %s Expected 2, got %d" % (FAIL, len(links)))
+ sys.exit(1)
+
+# Test 4: Verify link attributes
+print("Test 4: Verify link attributes")
+for i, link in enumerate(links):
+ href = link['href']
+ print(" Link %d: %s" % (i+1, href))
+ if not href.startswith('http://example.com/'):
+ print(" %s Unexpected href" % FAIL)
+ sys.exit(1)
+print(" %s All hrefs correct" % OK)
+
+# Test 5: Test attrs access (used by fetch.py)
+print("Test 5: Test attrs dict access")
+link = links[1]
+if 'rel' in link.attrs:
+ print(" %s rel attribute found: %s" % (OK, link.attrs['rel']))
+else:
+ print(" %s rel attribute missing" % FAIL)
+ sys.exit(1)
+
+print("")
+print("All tests passed!")