Pin dependencies

resources/chaosknoten/keycloak/docker_compose/compose.yaml.j2

@@ -46,7 +46,7 @@ services:
       - "8080:8080"
 
   db:
-    image: docker.io/library/postgres:15.14@sha256:5c5d7adc9921074ca0217c4dabd689d9e9777796074145bd2d90f46d1a683ea2
+    image: docker.io/library/postgres:15.14@sha256:9541969afa16d1ac724e16d1cf3c26ddd0c5bae5dd1c230118a7f5b9c14cde1f
     restart: unless-stopped
     networks:
       - keycloak

resources/chaosknoten/pad/docker_compose/compose.yaml.j2

@@ -3,7 +3,7 @@
 
 services:
   database:
-    image: docker.io/library/postgres:15-alpine@sha256:03bdf636bf6ad23222620ef85dca7b70fe34b99fb76138821f18608477c0f6db
+    image: docker.io/library/postgres:15-alpine@sha256:2e50ad404aead120409575d21758230cc295aec52dfa05ece9b4d0429bc38636
     environment:
       - "POSTGRES_USER=hedgedoc"
       - "POSTGRES_PASSWORD={{ secret__hedgedoc_db_password }}"

resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2

@@ -3,7 +3,7 @@
 
 services:
   database:
-    image: docker.io/library/postgres:15-alpine@sha256:03bdf636bf6ad23222620ef85dca7b70fe34b99fb76138821f18608477c0f6db
+    image: docker.io/library/postgres:15-alpine@sha256:2e50ad404aead120409575d21758230cc295aec52dfa05ece9b4d0429bc38636
     environment:
       - "POSTGRES_USER=pretalx"
       - "POSTGRES_PASSWORD={{ secret__pretalx_db_password }}"

resources/chaosknoten/tickets/docker_compose/compose.yaml.j2

@@ -1,7 +1,7 @@
 ---
 services:
   database:
-    image: docker.io/library/postgres:15-alpine@sha256:03bdf636bf6ad23222620ef85dca7b70fe34b99fb76138821f18608477c0f6db
+    image: docker.io/library/postgres:15-alpine@sha256:2e50ad404aead120409575d21758230cc295aec52dfa05ece9b4d0429bc38636
     environment:
       - "POSTGRES_USER=pretix"
       - "POSTGRES_PASSWORD={{ secret__pretix_db_password }}"