update

Dockerfile

-FROM jazzdd/alpine-flask
+FROM tiangolo/uwsgi-nginx-flask:python3.7
 
-ENV FLASK_APP=test.py
-WORKDIR /testweb
-COPY . /testweb
+COPY ./app /app
 
 EXPOSE 5000
 
-CMD ['/testweb/entrypoint.sh']

app/test.py

+from flask import Flask
+app = Flask(__name__)
+
+@app.route("/")
+def hello():
+    return "Hello World from Flask"
+
+if __name__ == "__main__":
+    # Only for debugging while developing
+    app.run(host='0.0.0.0', debug=True, port=5000)

entrypoint.sh

-#!/bin/sh
-
-flask run --host=0.0.0.0

test.py

-from flask import Flask
-app = Flask(__name__)
-
-@app.route('/')
-def hello_world():
-    return 'Hello World!'