chore(deps): pin postgres to version 17

This is already the "latest" and what people use when they run it
on localhost. It also aligns the version used on Github Actions to
run tests.

Ref: #2233

Author: till

.github/workflows/ruby.yml

@@ -9,8 +9,11 @@ jobs:
 
     services:
       postgres:
-        image: postgres:11.5
+        image: postgres:17
         ports: ["5432:5432"]
+        env:
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: test
         options: >-
           --health-cmd pg_isready
           --health-interval 10s
@@ -29,14 +32,14 @@ jobs:
 
     - name: Setup test database
       env:
-        DATABASE_URL: postgres://postgres:@localhost:5432/test
+        DATABASE_URL: postgres://postgres:postgres@localhost:5432/test
         RAILS_ENV: test
       run:
         bundle exec rake db:create db:migrate
 
     - name: Run tests
       env:
-        DATABASE_URL: postgres://postgres:@localhost:5432/test
+        DATABASE_URL: postgres://postgres:postgres@localhost:5432/test
         RAILS_ENV: test
       run: bundle exec rake spec
     - name: Report to Coveralls

docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   db:
-    image: postgres
+    image: postgres:17
     volumes:
       - db_data:/var/lib/postgresql/data
     environment: