updated env syntax

Author: rofrano

Dockerfile

@@ -17,9 +17,9 @@ USER flask
 
 # Expose any ports the app is expecting in the environment
 ENV FLASK_APP=wsgi:app
-ENV PORT 8080
+ENV PORT=8080
 EXPOSE $PORT
 
-ENV GUNICORN_BIND 0.0.0.0:$PORT
+ENV GUNICORN_BIND=0.0.0.0:$PORT
 ENTRYPOINT ["gunicorn"]
 CMD ["--log-level=info", "wsgi:app"]