docs(archive): update pillar.example with unofficial exporter

pillar.example

@@ -13,6 +13,8 @@ prometheus:
       - prometheus
       - alertmanager
       - node_exporter
+      - php-fpm_exporter
+      - postgres_exporter
       # - memcached_exporter  # not in upstream repo, only archive
 
   exporters:
@@ -171,6 +173,32 @@ prometheus:
             web.listen-address: ":9091"
             web.telemetry-path: "/metrics"
 
+      php-fpm_exporter:
+        version: v0.6.1
+        archive:
+          official: false
+          tar: false
+          # yamllint disable-line rule:line-length
+          source: https://github.com/bakins/php-fpm-exporter/releases/download/v0.6.1/php-fpm-exporter.linux.amd64
+          source_hash: 40e52d84f7decb5fdad9fadacf63cb2de26ebddce56e11b20651555e8d6c6130
+        service:
+          args:
+            addr: ":9253"
+            fastcgi: "unix:///run/php/php-fpm.sock"
+
+      postgres_exporter:
+        version: v0.8.0
+        service:
+          env:
+            - 'DATA_SOURCE_NAME=foo:bar@/'
+        archive:
+          official: false
+          # yamllint disable-line rule:line-length
+          source: https://github.com/wrouesnel/postgres_exporter/releases/download/v0.8.0/postgres_exporter_v0.8.0_linux-amd64.tar.gz
+          skip_verify: true
+
+
+
   linux:
     # 'Alternatives system' priority: zero disables (default)
     # yamllint disable-line rule:braces