ci: Add Jenkins pipeline

.containerignore

@@ -1,4 +0,0 @@
-*
-!src
-!Cargo.lock
-!Cargo.toml

Containerfile

@@ -1,31 +0,0 @@
-FROM docker.io/library/alpine AS build
-
-RUN --mount=type=cache,target=/var/cache/apk <<EOS
-xargs apk add <<PKGS
-cargo
-libc-dev
-openssl
-openssl-dev
-rust
-PKGS
-EOS
-
-WORKDIR /src
-
-COPY . .
-
-RUN --mount=type=cache,target=/usr/local/cargo/registry <<EOS
-set -e
-cargo build --release
-cp target/release/updatecheck /updatecheck
-strip /updatecheck
-EOS
-
-
-FROM docker.io/library/alpine
-
-RUN --mount=type=cache,target=/var/cache/apk apk add libgcc openssl
-
-COPY --from=build /updatecheck /usr/local/bin
-
-ENTRYPOINT ["updatecheck"]