Added pandas to have a long running installation step

Dockerfile

-FROM python:3-alpine
+FROM python:3-slim
 
 WORKDIR /app
 ADD requirements.txt ./
-RUN pip install -r requirements.txt && rm requirements.txt
+RUN pip install -r requirements.txt
 
-ADD app.py ./
 CMD ["python", "-u", "app.py"]
+
+ADD . ./

app.py

@@ -10,5 +10,5 @@ def index():
         <p>{ content }</p>
         """
 
-print("This is mor efficient")
+print("Starting ...")
 app.run(host="0.0.0.0", port=8080)
\ No newline at end of file

requirements.txt

-flask
\ No newline at end of file
+flask
+pandas
\ No newline at end of file