Fix file structure and add Dockerfile

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.9-slim
+FROM python:3.9
 
 WORKDIR /code
 
@@ -16,7 +16,7 @@ RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
 # Copy application code
 COPY ./app.py /code/app.py
-COPY ./templates/* /code/templates/
+COPY ./templates /code/templates
 
 # Make port 7860 available to the world outside this container
 EXPOSE 7860