chore(database): add postgres and valkey services

These are used by `strapi` and `directus` to store data.

services/database/compose.yml

@@ -0,0 +1,48 @@
+---
+services:
+  postgres:
+    image: 'postgres:17.4-bookworm'
+    hostname: ${CMS_POSTGRES_HOST:-postgres}
+    init: true
+    restart: unless-stopped
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - pg_isready
+        - --hostname
+        - localhost
+        - --username
+        - ${CMD_POSTGRES_USER:-postgres}
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_interval: 5s
+      start_period: 30s
+    environment:
+      POSTGRES_USER: ${CMS_POSTGRES_USER:-postgres}
+      POSTGRES_PASSWORD: ${CMS_POSTGRES_PASSWORD:-postgres}
+    volumes:
+      - 'postgres_data:/var/lib/postgresql/data'
+      - './scripts/postgres:/docker-entrypoint-initdb.d'
+
+  # NOTE: (jpd) this is an open-source alternative to redis
+  valkey:
+    image: 'valkey/valkey:8.0.2-bookworm'
+    hostname: ${CMS_VALKEY_HOST:-valkey}
+    init: true
+    restart: unless-stopped
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - '[ $$(redis-cli ping) = "PONG" ]'
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_interval: 5s
+      start_period: 30s
+    volumes:
+      - 'valkey_data:/data'
+
+volumes:
+  postgres_data: {}
+  valkey_data: {}

services/database/scripts/postgres/00-create-strapi-database.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+set -ex
+
+psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+    CREATE DATABASE strapi;
+    GRANT ALL PRIVILEGES ON DATABASE strapi TO ${POSTGRES_USER};
+EOSQL

services/database/scripts/postgres/01-create-directus-database.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+set -e
+
+psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+    CREATE DATABASE directus;
+    GRANT ALL PRIVILEGES ON DATABASE strapi TO ${POSTGRES_USER};
+EOSQL