Add container image build script

Containerfile

@@ -0,0 +1,38 @@
+FROM docker.io/library/alpine AS build
+
+RUN --mount=type=cache,target=/var/cache \
+	apk add \
+		cargo \
+		protoc \
+		rust \
+	&& :
+
+COPY src /src/src
+
+COPY Cargo.* /src/
+
+WORKDIR /src
+
+RUN cargo build --release
+
+
+FROM docker.io/library/alpine
+
+RUN --mount=type=cache,target=/var/cache \
+	apk add \
+		libgcc \
+	&& :
+
+COPY --from=build /src/target/release/luci /usr/local/bin/luci
+
+COPY dch-root-ca.crt /etc/ssl/certs
+
+COPY nsenter.sh /usr/local/libexec/nsenter.sh
+
+RUN for cmd in \
+	systemctl \
+	; do \
+	ln -s /usr/local/libexec/nsenter.sh /usr/local/bin/${cmd} \
+	; done
+
+ENTRYPOINT ["luci"]

nsenter.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec nsenter -t 1 -m -u -i -n -p "${0##*/}" "$@"