Update Dockerfile

Dockerfile

@@ -6,9 +6,9 @@ WORKDIR /app
 # Copy the current directory contents into the container at /app
 COPY . /app
 
-# Install dependencies
-COPY requirements.txt /app/requirements.txt
-RUN pip install --no-cache-dir -r requirements.txt
+# Install Gunicorn and your application dependencies
+RUN pip install --no-cache-dir gunicorn && \
+    pip install --no-cache-dir -r requirements.txt
 
 # Expose the port Gunicorn will listen on
 EXPOSE 7860