Add pg_prometheus (#283)

Co-authored-by: Evan Stanton <evanstanton@Evans-MBP.fritz.box>
Co-authored-by: Ian Stanton <ian@coredb.io>

contrib/pg_prometheus/Dockerfile

@@ -0,0 +1,15 @@
+# Set PostgreSQL version
+ARG PG_VERSION=15
+FROM quay.io/coredb/c-builder:pg${PG_VERSION}
+
+# Clone repository
+RUN git clone https://github.com/timescale/pg_prometheus.git
+
+# Set project version
+ARG RELEASE=0.2.2
+
+# Build extension
+RUN cd pg_prometheus && \
+    git fetch origin ${RELEASE} && \
+    git checkout ${RELEASE} && \
+    make

contrib/pg_prometheus/Trunk.toml

@@ -0,0 +1,19 @@
+[extension]
+name = "pg_prometheus"
+version = "0.2.2"
+repository = "https://github.com/timescale/pg_prometheus"
+license = "Apache-2.0"
+description = "PostgreSQL extension for Prometheus data."
+documentation = "https://github.com/timescale/pg_prometheus"
+categories = ["metrics"]
+
+[build]
+postgres_version = "15"
+platform = "linux/amd64"
+dockerfile = "Dockerfile"
+install_command = """
+    cd pg_prometheus && make install
+    set -x
+    mv /usr/local/pgsql/share/extension/* /usr/share/postgresql/15/extension
+    mv /usr/local/pgsql/lib/* /usr/lib/postgresql/15/lib
+    """