Dockerized everything and added CI/CD deployment

backend/Dockerfile

@@ -0,0 +1,19 @@
+# backend/Dockerfile
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Set environment variables to prevent buffering issues with logs
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Install dependencies
+COPY ./requirements.txt /app/requirements.txt
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy application code (AFTER installing dependencies for better caching)
+COPY . /app/
+
+RUN adduser --disabled-password --gecos "" appuser && chown -R appuser /app
+USER appuser