Fixed Dockerfile

solution/Dockerfile

@@ -4,8 +4,7 @@ WORKDIR /app
 
 ENV PYTHONDONTWRITEBYTECODE 1
 ENV PYTHONUNBUFFERED 1
-ENV SERVER_ADDRESS = 0.0.0.0
-ENV SERVER_PORT=8080
+ENV SERVER_PORT = 8080
 ENV DJANGO_DEBUG = False
 
 RUN pip3 install --upgrade pip
@@ -16,4 +15,4 @@ WORKDIR /app
 
 COPY . .
 
-CMD ["sh", "-c", "cd pulse && exec python3 manage.py runserver $SERVER_ADDRESS:$SERVER_PORT"]
+CMD ["sh", "-c", "cd pulse && exec python3 manage.py runserver 0.0.0.0:$SERVER_PORT"]