Add healthchecks for different containers.

docker-compose.yaml

@@ -91,6 +91,8 @@ services:
       - ${PWD}/mysql_databases.sql:/docker-entrypoint-initdb.d/01_create_databases.sql
     networks:
       - internal
+    healthcheck:
+      test: ["CMD-SHELL", "mysqladmin ping -uroot -p$$(DB_ROOT_PW)"]
 
   psql14:
     image: postgres:14-alpine
@@ -104,6 +106,8 @@ services:
       - ${PWD}//postgres_databases.sql:/docker-entrypoint-initdb.d/01_create_databases.sql
     networks:
       - internal
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
 
   redis:
     image: redis:alpine
@@ -113,4 +117,6 @@ services:
       - redis-data:/data
     networks:
       - internal
+    healthcheck:
+      test: ["CMD-SHELL", "redis-cli ping"]