feat: initial commit

Axum/Postgres server with auth, migrations, and Docker setup.

Dockerfile

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+FROM rust:1-slim-bookworm AS builder
+WORKDIR /app
+
+# Cache dependencies before copying source
+COPY Cargo.toml Cargo.lock ./
+RUN mkdir src && echo "fn main() {}" > src/main.rs \
+    && cargo build --release \
+    && rm -rf src
+
+COPY src ./src
+# Touch main.rs so cargo knows the real source changed
+RUN touch src/main.rs && cargo build --release
+
+FROM debian:bookworm-slim
+RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+COPY --from=builder /app/target/release/rustification-server /usr/local/bin/server
+EXPOSE 3000
+CMD ["server"]