refactor: change image layout to enable renovate updates of sidecarts (#955)

* some cleanup for common (+6 squashed commit)

Squashed commit:

[43a501de8] bump sogo

[62c009b63] some tryouts

[6840fafdb] try to fix rendering of new format

[003d3c81b] move seperate apps to new format and fix mistake in common

[752ae2c68] more work on the image refactor

[edfc28533] refactor common images

* sogo scale differently

* slight release build fix

* fix issues with release script and multiple tags

charts/stable/authelia/SCALE/ix_values.yaml

@@ -9,6 +9,12 @@ image:
   pullPolicy: IfNotPresent
   tag: "4.30.4"
 
+postgresqlImage:
+  repository: postgres
+  pullPolicy: IfNotPresent
+  tag: 13.4-alpine
+
+
 enableServiceLinks: false
 
 command: ["authelia"]
@@ -17,7 +23,7 @@ args: ["--config=/configuration.yaml"]
 
 initContainers:
   init-postgresdb:
-    image: postgres:13.1
+    image: "{{ .Values.postgresqlImage.repository}}:{{ .Values.postgresqlImage.tag }}"
     command:
       - "sh"
       - "-c"