[scout_apm] Add scout apm to Gemfile, add config file

config/scout_apm.yml

@@ -0,0 +1,38 @@
+# This configuration file is used for Scout APM.
+# Environment variables can also be used to configure Scout. See our help docs at https://docs.scoutapm.com#environment-variables for more information.
+common: &defaults
+
+  # key: Your Organization key for Scout APM. Found on the settings screen.
+  # - Default: none
+  # key: not-to-be-committed
+
+  # log_level: Verboseness of logs.
+  # - Default: 'info'
+  # - Valid Options: debug, info, warn, error
+  log_level: debug
+
+  # name: Application name in APM Web UI
+  # - Default: the application names comes from the Rails or Sinatra class name
+  # name: GabSocial
+
+  # monitor: Enable Scout APM or not
+  # - Default: none
+  # - Valid Options: true, false
+
+production:
+  <<: *defaults
+  monitor: true
+  auto_instruments: true
+
+development:
+  <<: *defaults
+  monitor: true
+  auto_instruments: true
+
+test:
+  <<: *defaults
+  monitor: false
+
+staging:
+  <<: *defaults
+