adding the dockerfile for backend deployment

backend/Dockerfile

@@ -14,6 +14,28 @@
 
 
 
+# FROM python:3.11-slim
+
+# WORKDIR /code
+
+# RUN apt-get update && apt-get install -y git
+
+# COPY ./backend/requirements.txt .
+# RUN pip install --no-cache-dir --upgrade -r requirements.txt
+
+# COPY ./ml_models /code/sentiment_model
+
+# WORKDIR /code/app
+
+# # This is the default command for our web server
+# CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "10000"]
+
+
+
+
+
+
+
 FROM python:3.11-slim
 
 WORKDIR /code
@@ -21,11 +43,15 @@ WORKDIR /code
 RUN apt-get update && apt-get install -y git
 
 COPY ./backend/requirements.txt .
-RUN pip install --no-cache-dir --upgrade -r requirements.txt
+# Install Gunicorn for a production-ready server
+RUN pip install gunicorn
+RUN pip install --no-cache-dir -r requirements.txt
 
 COPY ./ml_models /code/sentiment_model
 
-WORKDIR /code/app
+# Copy the application code last
+COPY ./backend .
 
-# This is the default command for our web server
-CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "10000"]
+# This CMD will be used by the web service on Railway.
+# It uses the $PORT variable that Railway provides automatically.
+CMD ["gunicorn", "-w", "2", "-k", "uvicorn.workers.UvicornWorker", "main:app", "--bind", "0.0.0.0:${PORT}"]