Fix to import opencv, but an old version

Dockerfile

@@ -1,25 +1,23 @@
-#Grab the latest alpine image
-FROM alpine:latest
+FROM heroku/heroku:16
 
-# Install python and pip
-RUN apk add --no-cache --update python py-pip bash
-ADD ./webapp/requirements.txt /tmp/requirements.txt
+# Install pip and opencv
+RUN apt-get update && apt-get install -y python-pip python-opencv
 
 # Install dependencies
+ADD ./webapp/requirements.txt /tmp/requirements.txt
 RUN pip install --no-cache-dir -q -r /tmp/requirements.txt
 
 # Add our code
 ADD ./webapp /opt/webapp/
 WORKDIR /opt/webapp
 
 # Expose is NOT supported by Heroku
-# EXPOSE 5000 		
+# EXPOSE 5000
 
 # Run the image as a non-root user
-RUN adduser -D myuser
+RUN useradd -m myuser
 USER myuser
 
 # Run the app.  CMD is required to run on Heroku
-# $PORT is set by Heroku			
-CMD gunicorn --bind 0.0.0.0:$PORT wsgi 
-
+# $PORT is set by Heroku
+CMD gunicorn --bind 0.0.0.0:$PORT wsgi

webapp/app.py

@@ -1,12 +1,13 @@
 import os
+import cv2
 
 from flask import Flask
 
 app = Flask(__name__)
 
 @app.route('/')
 def hello():
-    return 'Hello world!'
+    return cv2.__version__
 
 if __name__ == '__main__':
     app.run(host='0.0.0.0')