add README and build scripts

build/Dockerfile

@@ -0,0 +1,16 @@
+ARG RUST_VERSION="1.62"
+ARG ALPINE_VERSION="3.16"
+
+FROM rust:${RUST_VERSION}-alpine${ALPINE_VERSION}
+ARG APK_MIRROR=""
+ARG CRATES_MIRROR=""
+
+RUN [ ! -z "${APK_MIRROR}" ] && sed -i "s/dl-cdn.alpinelinux.org/${APK_MIRROR}/g" /etc/apk/repositories; apk update; apk add gcc sqlite
+RUN [ ! -z "${CRATES_MIRROR}" ] && printf '[source.crates-io]\nreplace-with = "mirror"\n\n[source.mirror]\nregistry = "%s"\n' "${CRATES_MIRROR}" > $CARGO_HOME/config; true
+ADD . /src
+WORKDIR /src
+RUN cargo build --release
+
+FROM alpine:${ALPINE_VERSION}}
+COPY --from=0 /src/target/release/rust-template /bin/rust-template
+ENTRYPOINT [ "/bin/rust-template" ]