Added Dockerfile and tests.

Signed-off-by: Pavel Kirilin <win10@list.ru>

Dockerfile

@@ -0,0 +1,24 @@
+FROM rust:1.67.1-alpine3.17 as builder
+
+WORKDIR /app
+COPY Cargo.toml Cargo.lock ./
+COPY src ./src
+RUN cargo build --release --all-features
+
+FROM debian:bullseye-20230109-slim as base
+
+RUN apt-get update \
+    && apt-get install -y openssl ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY static ./static
+
+COPY --from=builder /app/target/release/s3bot /usr/local/bin/
+
+ENTRYPOINT ["/usr/local/bin/s3bot"]
+
+FROM base as rootless
+
+RUN useradd --create-home  -u 1000 --user-group s3bot
+WORKDIR /home/s3bot
+USER s3bot