Add CI configuration

.gitlab-ci.yml

+include:
+  - "https://git.autistici.org/pipelines/containers/raw/master/common.yml"
+  - "https://git.autistici.org/pipelines/images/test/golang/raw/master/ci.yml"
+

Dockerfile

+# Don't build a static binary, the duckdb libraries need NSS for name
+# resolution and such anyway.
+FROM golang:1.21 AS build
+ADD . /src
+WORKDIR /src
+RUN go build -trimpath -o /pqlogd ./cmd/pqlogd
+
+FROM registry.git.autistici.org/pipelines/images/base/debian:bookworm
+COPY --from=build /pqlogd /usr/bin/pqlogd
+
+ENTRYPOINT ["/usr/bin/pqlogd"]