examples: add healthchecks and service_healthy depends_on to mariadb apache

Closes #2250

Author: Neha-2005-VCE

.examples/docker-compose/insecure/mariadb/apache/compose.yaml

@@ -15,12 +15,24 @@ services:
       - MARIADB_DISABLE_UPGRADE_BACKUP=1
     env_file:
       - db.env
+    healthcheck:
+      test: ["CMD", "healthcheck.sh", "--innodb_initialized"]
+      interval: 30s
+      timeout: 10s
+      retries: 5
+      start_period: 30s
 
   # Note: Redis is an external service. You can find more information about the configuration here:
   # https://hub.docker.com/_/redis
   redis:
     image: redis:alpine
     restart: always
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 30s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
 
   app:
     image: nextcloud:apache
@@ -36,8 +48,10 @@ services:
     env_file:
       - db.env
     depends_on:
-      - db
-      - redis
+      db:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
 
   cron:
     image: nextcloud:apache