feat: Add deployment infrastructure and documentation

Docker:
- Add production-ready Dockerfiles for all microservices
- Optimize for multi-stage builds and minimal image sizes

Kubernetes:
- Add namespace and service manifests
- Include MongoDB and Redis deployment configurations
- Configure API server and charging engine deployments

Documentation:
- Add comprehensive README with platform overview
- Include technology stack and quick start instructions
- Provide prerequisites and setup guidance

deployments/docker/charging-engine.Dockerfile

@@ -0,0 +1,27 @@
+FROM rust:1.94-slim AS builder
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y \
+    pkg-config \
+    libssl-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY Cargo.toml Cargo.lock ./
+COPY apps/charging-engine ./apps/charging-engine
+
+RUN cargo build --release --bin charging-engine
+
+FROM debian:bookworm-slim
+
+RUN apt-get update && apt-get install -y \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY --from=builder /app/target/release/charging-engine .
+
+EXPOSE 8080
+
+CMD ["./charging-engine"]