Add PGID and PUID options (#144)

- Adds PGID as a values.yaml setting that sets PGID env-var
- Adds PUID as a values.yaml settings that sets PGID env-var
- Adjusts Common Unit test accordingly
(both can also in the future be used to set securityContext based containers)

library/common/values.yaml

@@ -32,6 +32,7 @@ serviceAccount:
   # If not set and create is true, a name is generated using the fullname template
   name: ""
 
+
 env: {}
   # TZ: UTC
 
@@ -450,6 +451,9 @@ addons:
 
 ## TrueCharts Specific
 
+PUID: 568
+PGID: 568
+
 appAdditionalServicesEnabled: false
 # appAdditionalServices:
 #   api: