Phase 2.1: Backend project initialized with Docker configuration

- Created Cargo.toml with all required dependencies
- Implemented health/ready endpoints
- Added Docker configuration (production + development)
- Configured docker-compose with resource limits
- Set up MongoDB service with persistence
- Verified build (cargo check passed)
- Prepared monorepo structure for mobile/web/shared

Next: Phase 2.2 (MongoDB connection and models)

backend/docker/Dockerfile

@@ -0,0 +1,18 @@
+FROM rust:1.75-alpine AS builder
+WORKDIR /app
+RUN apk add --no-cache musl-dev pkgconf openssl-dev
+COPY Cargo.toml Cargo.lock ./
+RUN mkdir src && echo 'fn main() {}' > src/main.rs
+RUN cargo build --release && rm -rf src
+COPY src ./src
+RUN touch src/main.rs && cargo build --release
+
+FROM alpine:3.18
+WORKDIR /app
+RUN apk add --no-cache ca-certificates openssl wget
+COPY --from=builder /app/target/release/normogen-backend /app/normogen-backend
+RUN addgroup -g 1000 normogen && adduser -D -u 1000 -G normogen normogen && chown -R normogen:normogen /app
+USER normogen
+EXPOSE 8000
+HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 CMD wget --no-verbose --tries=1 --spider http://localhost:8000/health || exit 1
+CMD ['./normogen-backend']