Updated dockerfile and run script to work with heroku deployment

Dockerfile

@@ -5,6 +5,4 @@ COPY . .
 
 RUN pip install --no-cache-dir -r requirements.txt
 
-EXPOSE 5000
-
 CMD ["./run.sh"]

app/routes.py

@@ -115,4 +115,4 @@ def window():
 
 
 if __name__ == '__main__':
-    app.run(debug=True, host='0.0.0.0')
+    app.run(debug=True)

run.sh

@@ -1,6 +1,11 @@
 #!/bin/bash
 
-SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+SCRIPT=`realpath $0`
+SCRIPT_DIR=`dirname $SCRIPT`
+
+if [[ -z "${PORT}" ]]; then
+    PORT=5000
+fi
 
 # Create config json if it doesn't exist
 if [[ ! -f $SCRIPT_DIR/app/static/config.json ]]; then
@@ -9,6 +14,4 @@ fi
 
 pkill flask
 
-# TODO: Set up the following for running over https
-#--cert=./app/cert.pem --key=./app/key.pem
-flask run --host="0.0.0.0"
+flask run --host="0.0.0.0" --port=$PORT