Fix: Add error handling for missing files and use PORT env var correctly

Dockerfile

@@ -47,4 +47,5 @@ HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
     CMD curl --fail http://localhost:${PORT:-7860}/_stcore/health || exit 1
 
 # Run Streamlit app using PORT env var from Hugging Face Spaces
-CMD ["bash", "-c", "streamlit run app.py --server.address=0.0.0.0 --server.port=${PORT:-7860} --server.headless=true"]
+# HuggingFace sets $PORT, don't override it.
+CMD ["bash", "-c", "streamlit run app.py --server.address=0.0.0.0 --server.port=$PORT --server.headless=true"]

app.py

@@ -41,15 +41,21 @@ def rewrite_message(
 # Page setup & CSS
 # ──────────────────────────────────────────────────────────────
 st.set_page_config(page_title="MemMachine Chatbot", layout="wide")
-with open("./styles.css") as f:
-    st.markdown(f"<style>{f.read()}</style>", unsafe_allow_html=True)
+try:
+    with open("./styles.css") as f:
+        st.markdown(f"<style>{f.read()}</style>", unsafe_allow_html=True)
+except FileNotFoundError:
+    st.markdown("<style></style>", unsafe_allow_html=True)
 
 
 # ──────────────────────────────────────────────────────────────
 # Sidebar
 # ──────────────────────────────────────────────────────────────
 with st.sidebar:
-    st.image("./assets/memmachine_logo.png", use_container_width=True)
+    try:
+        st.image("./assets/memmachine_logo.png", use_container_width=True)
+    except FileNotFoundError:
+        st.markdown("### MemMachine")
 
     st.markdown("#### Choose Model")