Update Dockerfile

Dockerfile

@@ -1,9 +1,13 @@
+# Use a lightweight Python base image
 FROM python:3.9-slim
 
-# Set working directory
+# Optionally allow overriding port at build time
+ARG PORT=7860
+ENV PORT=${PORT}
+
 WORKDIR /app
 
-# Install system dependencies
+# Install system dependencies needed by many ML/AI and media libraries
 RUN apt-get update && apt-get install -y \
     ffmpeg \
     libgl1 \
@@ -13,22 +17,22 @@ RUN apt-get update && apt-get install -y \
     libxext6 \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy requirements first for better caching
+# Copy dependency files first to leverage Docker cache
 COPY requirements.txt .
 COPY packages.txt .
 
 # Install Python dependencies
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Copy application files
+# Copy application code
 COPY . .
 
-# Expose port
-EXPOSE 7860
+# Ensure your app uses the PORT environment variable
+EXPOSE ${PORT}
 
-# Health check
+# Healthcheck (adjust the path if your app uses a different one)
 HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
-    CMD curl -f http://localhost:7860/_stcore/health || exit 1
+    CMD curl -f http://localhost:${PORT}/_stcore/health || exit 1
 
-# Run the application
-CMD ["streamlit", "run", "app.py", "--server.port=7860", "--server.address=0.0.0.0"]
+# Run the application — make sure your app or command respects $PORT
+CMD ["streamlit", "run", "app.py", "--server.port=${PORT}", "--server.address=0.0.0.0"]