INIT(api): add FastAPI application

- Initialize FastAPI project structure
- Add basic API configuration

deploy/k8s/overlays/prod/deployment-patch.yaml

@@ -0,0 +1,19 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: joossam-app
+  labels:
+    environment: production
+spec:
+  replicas: 1
+  template:
+    spec:
+      containers:
+        - name: joossam-app
+          resources:
+            requests:
+              memory: "100Mi"
+              cpu: "50m"
+            limits:
+              memory: "200Mi"
+              cpu: "200m"