Update Dockerfile

Dockerfile

@@ -4,7 +4,7 @@ WORKDIR /code
 
 COPY . /code/ 
 
-RUN apt-get update -y && apt-get upgrade -y && apt-get install -y python3-tk
+RUN apt-get update -y && apt-get upgrade -y && apt-get install -y python3-tk tk-dev libagg-dev
 RUN pip install --upgrade pip
 RUN pip install --no-cache-dir --require-hashes --no-deps -r /code/pre-requirements.txt
 RUN pip install --no-cache-dir --no-deps -r /code/requirements.txt