added path info

Dockerfile

@@ -5,7 +5,7 @@ FROM python:3.10-slim
 WORKDIR /app
 
 # Copy the current directory contents into the container at /app
-COPY . /app	
+COPY . /app
 
 # Install any needed packages specified in requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt
@@ -13,6 +13,9 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Install Graphviz system package
 RUN apt-get update && apt-get install -y graphviz
 
+# Explicitly add the Graphviz binaries to the PATH
+ENV PATH="/usr/bin:${PATH}"
+
 # Make port 7860 available to the world outside this container
 EXPOSE 7860