chore(deps): pin dependencies

Author: renovate[bot]

Dockerfile

@@ -1,4 +1,4 @@
 # For documentation see https://jboss-container-images.github.io/openjdk/
-FROM registry.access.redhat.com/ubi9/openjdk-21-runtime:latest
+FROM registry.access.redhat.com/ubi9/openjdk-21-runtime:latest@sha256:14e5af876865b25abdc15c137dd30e68b3394aaee18e26bd1777036a52a907c5
 
 COPY target/*.jar /deployments/spring-boot-application.jar

stack/docker-compose.yml

@@ -121,7 +121,7 @@ services:
       retries: 120
 
   postgres:
-    image: postgres:16.6-alpine3.21
+    image: postgres:16.6-alpine3.21@sha256:1d04b9ba1d4996401f2552b51beda8187f175c0645c091e4781134fc9c9a3eef
     environment:
       - POSTGRES_DB=dave-db
       - POSTGRES_USER=dave
@@ -141,7 +141,7 @@ services:
 
   # see https://event-driven.io/en/automatically_connect_pgadmin_to_database/
   pg-admin:
-    image: dpage/pgadmin4:8.14
+    image: dpage/pgadmin4:8.14@sha256:8a68677a97b8c8d1427dc915672a26d2c4a04376916a68256f53d669d6171be7
     environment:
       - [email protected]
       - PGADMIN_DEFAULT_PASSWORD=admin