ci: Add Jenkins build pipeline

We'll build and publish `tmpl` with a container image, to make it easier
for other container images to include it.

Containerfile

@@ -0,0 +1,25 @@
+FROM registry.fedoraproject.org/fedora-minimal:39 AS build
+
+RUN --mount=type=cache,target=/var/cache \
+    microdnf install -y \
+        --setopt install_weak_deps=0 \
+        cargo\
+    && :
+
+COPY . /src
+
+WORKDIR /src
+
+RUN cargo build --release --locked
+
+
+FROM registry.fedoraproject.org/fedora-minimal:39
+
+COPY --from=build /src/target/release/tmpl /usr/local/bin
+
+ENTRYPOINT ["/usr/local/bin/tmpl"]
+
+LABEL name='tmpl' \
+    vendor='Dustin C. Hatch' \
+    license='MIT OR APACHE-2.0' \
+    version='0.1.0'