remove Heroku and update readme

README.md

@@ -51,11 +51,12 @@ docker build -t morsisdivine/sentiment .
 
 # Run your Docker container, mapping port 5001 of the container to port 5001 on your host
 
-docker run -p 5001:5001 -e LAUNCHDARKLY_SDK_KEY=sdk-9e46ce06-388b-4901-a89a-7cc49eece1c0 morsisdivine/sentiment
+docker run -p 5001:5001 -e LAUNCHDARKLY_SDK_KEY=<LD_KEY> morsisdivine/sentiment
 
 ### UI
 
 python3 -m venv myenv  
 source myenv/bin/activate
+pip3 install -r requirements.txt
 
 LAUNCHDARKLY_SDK_KEY=<LAUNCHDARKLY_SDK_KEY> streamlit run app.py

heroku.yml

@@ -1,5 +0,0 @@
-build:
-  docker:
-    web: dockerfile
-run:
-  web: gunicorn -w 4 -b 0.0.0.0:5001 api:app