Update Dockerfile

Dockerfile

@@ -6,12 +6,14 @@ COPY requirements.txt .
 RUN pip install --prefix=/install -r requirements.txt
 
 COPY app.py telegram_preview.py ./
+COPY templates/ templates/     # include HTML templates
 
 # compile both files
-RUN python -m compileall -b -f app.py telegram_preview.py          # → app.pyc
+RUN python -m compileall -b -f app.py telegram_preview.py
 
-# bundle both .pyc files together
-RUN tar -czf /build/app.tgz app.pyc telegram_preview.pyc            # bundle
+# bundle everything needed
+RUN tar -czf /build/app.tgz \
+    app.pyc telegram_preview.pyc templates/preview.html
 
 ################ runtime ################
 FROM python:3.9-slim
@@ -27,10 +29,10 @@ EXPOSE 7860
 # -------- no file, all inline --------
 ENTRYPOINT ["bash", "-c", "\
   set -euo pipefail; \
-  mkdir -p /tmp/runner; \
+  mkdir -p /tmp/runner/templates; \
   cp /app/app.tgz /tmp/runner/; \
   tar -xzf /tmp/runner/app.tgz -C /tmp/runner; \
   python /tmp/runner/app.pyc & pid=$!; \
   sleep 2; \
   rm -f /tmp/runner/app.pyc /tmp/runner/telegram_preview.pyc /tmp/runner/app.tgz; \
-  wait $pid"]
+  wait $pid"]