Initial commit: Clean Mold Cost Calculator application

- Flask-based mold cost calculation application
- PostgreSQL database with SQLAlchemy ORM
- Docker/Podman containerization
- Comprehensive documentation in docs/
- Clean, organized codebase without obsolete files
- Production-ready deployment configuration
- Enhanced pytest configuration with coverage reporting
- Master/Development branch structure

Dockerfile

@@ -0,0 +1,46 @@
+FROM python:3.11-slim AS builder
+
+# Set working directory
+WORKDIR /app
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements file
+COPY requirements.txt .
+
+# Install dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Final stage
+FROM python:3.11-slim
+
+# Set working directory
+WORKDIR /app
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy site-packages and binaries from builder
+COPY --from=builder /usr/local/lib/python3.11/site-packages/ /usr/local/lib/python3.11/site-packages/
+COPY --from=builder /usr/local/bin/ /usr/local/bin/
+
+# Create necessary directories
+RUN mkdir -p /app/logs /app/instance && \
+    chmod -R 777 /app/logs /app/instance
+
+# Copy application files
+COPY . .
+
+# Set environment variables
+ENV FLASK_APP=run.py
+ENV FLASK_ENV=production
+
+# Expose port
+EXPOSE 5002
+
+# Run gunicorn
+CMD ["gunicorn", "--bind", "0.0.0.0:5002", "--workers", "4", "app:create_app()"]