feat: adding additional exporters

- postgres_exporter
- pgbouncer_exporter
- bind_exporter

rpms/postgres_exporter/resources/build.sh

@@ -0,0 +1,2 @@
+#!/usr/bin/bash
+nfpm pkg --config /app/resources/nfpm.yaml --target /app/dist --packager rpm

rpms/postgres_exporter/resources/nfpm.yaml

@@ -0,0 +1,37 @@
+# nfpm.yaml
+
+name: postgres_exporter
+version: ${PACKAGE_VERSION}
+release: ${PACKAGE_RELEASE}
+arch: amd64
+platform: linux
+section: default
+priority: extra
+description: "A PostgreSQL metric exporter for Prometheus"
+maintainer: Prometheus
+homepage: https://github.com/prometheus-community/postgres_exporter
+license: Apache-2.0 license
+
+disable_globbing: false
+
+replaces:
+  - postgres_exporter
+
+provides:
+  - postgres_exporter
+
+# Files to include in the package
+contents:
+  - src: /app/postgres_exporter
+    dst: /usr/bin/postgres_exporter
+    file_info:
+      mode: 0755
+      owner: root
+      group: root
+
+# Scripts to run during installation/removal (optional)
+# scripts:
+#   preinstall: ./scripts/preinstall.sh
+#   postinstall: ./scripts/postinstall.sh
+#   preremove: ./scripts/preremove.sh
+#   postremove: ./scripts/postremove.sh