Update Dockerfile

Dockerfile

@@ -6,14 +6,15 @@ COPY requirements.txt .
 RUN pip install --prefix=/install -r requirements.txt
 
 COPY app.py telegram_preview.py ./
-COPY templates/ templates/     
+COPY templates/ templates/ 
+COPY static/    static/
 
 # compile both files
 RUN python -m compileall -b -f app.py telegram_preview.py
 
 # bundle everything needed
 RUN tar -czf /build/app.tgz \
-    app.pyc telegram_preview.pyc templates/
+    app.pyc telegram_preview.pyc templates/ static/
 
 ################ runtime ################
 FROM python:3.9-slim