ipabusedb-docker-reporter: rename from ipabusedb-docker-ssh, add Dockerfile with runit service

Build on git.eeqj.de/sneak/baseimage:2026-11-05 with the docker CLI
copied from docker:cli. A runit service sleeps INTERVAL seconds
(default 1200), then runs the reporter with --since INTERVAL --submit;
DOCKER_CONTAINER_NAME and IPABUSEDB_API_KEY come from the container
environment. Add .dockerignore, make image, and README section; fix the
binary name in .gitignore.

ipabusedb-docker-reporter/Dockerfile

@@ -0,0 +1,39 @@
+# syntax=docker/dockerfile:1
+#
+# Runs ipabusedb-docker-reporter as a runit service under the baseimage's
+# runsvinit: sleep INTERVAL seconds, report the last INTERVAL seconds of
+# sshd brute-force attempts to AbuseIPDB, repeat.
+#
+# Run with the host's docker socket bind-mounted and the config in the
+# container environment:
+#
+#   docker run -d --restart unless-stopped \
+#     -v /var/run/docker.sock:/var/run/docker.sock \
+#     -e DOCKER_CONTAINER_NAME=sshd \
+#     -e IPABUSEDB_API_KEY=... \
+#     -e INTERVAL=1200 \
+#     ipabusedb-docker-reporter
+
+FROM git.eeqj.de/sneak/baseimage:2026-11-05
+
+# The reporter shells out to "docker logs", so it needs the docker CLI.
+# The static binary from the official CLI image avoids pulling the whole
+# docker.io package (and daemon) in via apt.
+COPY --from=docker:cli /usr/local/bin/docker /usr/local/bin/docker
+
+WORKDIR /src
+COPY go.mod go.sum ./
+RUN --mount=type=cache,target=/root/go/pkg/mod go mod download
+COPY *.go ./
+RUN --mount=type=cache,target=/root/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 go build -o /usr/local/bin/ipabusedb-docker-reporter .
+
+COPY sv/ipabusedb-docker-reporter/run /etc/sv/ipabusedb-docker-reporter/run
+RUN chmod +x /etc/sv/ipabusedb-docker-reporter/run \
+    && ln -s /etc/sv/ipabusedb-docker-reporter /etc/service/ipabusedb-docker-reporter
+
+# Seconds to sleep between runs; also the --since window of each run.
+ENV INTERVAL=1200
+
+WORKDIR /