Adding two placeholder containers

app.py

@@ -1,11 +1,68 @@
 #!/usr/bin/env python3
 
+import os
+
 from aws_cdk import core
+import aws_cdk.aws_ec2 as ec2
+import aws_cdk.aws_ecs as ecs
+import aws_cdk.aws_ecs_patterns as ecs_patterns
 
 from karaokeme_cdk.karaokeme_cdk_stack import KaraokemeCdkStack
 
 
-app = core.App()
-KaraokemeCdkStack(app, "karaokeme-cdk")
+class BaseResources(core.Stack):
+    def __init__(self, *args, **kwargs):
+        super(BaseResources, self).__init__(*args, **kwargs)
 
+        # Network
+        self.vpc = ec2.Vpc(self, 'karaoke-vpc')
+
+        # ECS cluster
+        self.cluster = ecs.Cluster(self, 'karaoke-cluster',
+            vpc=self.vpc)
+
+
+class HttpApi(core.Stack):
+    def __init__(self, scope, id, cluster: ecs.Cluster,  **kwargs):
+        super().__init__(scope, id, **kwargs)
+
+        api_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), 'api-placeholder'))
+
+        self.api = ecs_patterns.ApplicationLoadBalancedFargateService(self, 'http-api-service',
+            cluster=cluster,
+            task_image_options=ecs_patterns.ApplicationLoadBalancedTaskImageOptions(
+                image=ecs.ContainerImage.from_asset(directory=api_dir),
+                container_port=8080),
+            desired_count=2,
+            cpu=256,
+            memory_limit_mib=512)
+
+
+class SeparatorWorker(core.Stack):
+    def __init__(self, scope, id, cluster: ecs.Cluster, **kwargs):
+        super().__init__(scope, id, **kwargs)
+
+        worker_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), 'worker-placeholder'))
+
+        self.service = ecs_patterns.QueueProcessingFargateService(self, 'separator-service',
+            cpu=256,
+            memory_limit_mib=512,
+            image=ecs.ContainerImage.from_asset(directory=worker_dir),
+            cluster=cluster)
+
+
+class KaraokeApp(core.App):
+    def __init__(self, *args, **kwargs):
+        super(KaraokeApp, self).__init__(*args, **kwargs)
+
+        self.base_resources = BaseResources(self, 'base-resources')
+
+        self.http_api = HttpApi(self, 'http-api',
+            cluster=self.base_resources.cluster)
+
+        self.separator_worker = SeparatorWorker(self, 'separator-worker',
+            cluster=self.base_resources.cluster)
+
+
+app = KaraokeApp()
 app.synth()