Initial kosync-rs port

Dockerfile

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+FROM --platform=$BUILDPLATFORM rust:1-bookworm AS builder
+
+WORKDIR /src
+RUN apt-get update \
+    && apt-get install --no-install-recommends -y build-essential ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY Cargo.toml Cargo.lock ./
+COPY migrations ./migrations
+COPY src ./src
+COPY tests ./tests
+
+RUN cargo build --release --locked
+
+FROM debian:bookworm-slim
+
+RUN apt-get update \
+    && apt-get install --no-install-recommends -y ca-certificates \
+    && rm -rf /var/lib/apt/lists/* \
+    && useradd --system --uid 10001 --home-dir /data --create-home kosync
+
+COPY --from=builder /src/target/release/kosync-rs /usr/local/bin/kosync-rs
+
+USER kosync
+WORKDIR /data
+ENV KOSYNC_DB=/data/kosync.sqlite3
+ENV KOSYNC_TLS=auto
+ENV ENABLE_USER_REGISTRATION=true
+ENV RUST_LOG=info
+
+EXPOSE 7200 17200
+VOLUME ["/data"]
+
+HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
+    CMD ["kosync-rs", "healthcheck", "--url", "https://127.0.0.1:7200/healthcheck", "--insecure"]
+
+ENTRYPOINT ["kosync-rs"]
+CMD ["serve"]