chore: Update resource limits and requests for client-react Deployment

- Update the CPU limit to 50m and memory limit to 100Mi for the client-react Deployment in the demo-app namespace.
- Add a new ConfigMap.yaml file for nginx-custom with an index.html file.
- Add a new Deployment.yaml file for nginx-custom in the nginx-demo namespace.
- Add a new Namespace.yaml file for nginx-custom.
- Add a new Service.yaml file for nginx-custom in the nginx-demo namespace.
- Add a new trivy.md file to provide information about Trivy and its installation and uninstallation.

docs/kubernetes/demo-apps/go-node-react-postgres/client-react/Deployment.yaml

@@ -29,6 +29,7 @@ spec:
           resources:
             limits:
               memory: 100Mi
+              cpu: 50m
             requests:
               cpu: 50m
               memory: 100Mi

docs/kubernetes/demo-apps/nginx-custom/ConfigMap.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: nginx-configmap
+data:
+  index.html: |
+    <h1> Hello World from ConfigMap </h1>

docs/kubernetes/demo-apps/nginx-custom/Deployment.yaml

@@ -0,0 +1,42 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  namespace: nginx-demo
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: nginx-app
+  template:
+    metadata:
+      labels:
+        app: nginx-app
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:latest
+        ports:
+        - containerPort: 80
+        resources:
+          limits:
+            cpu: 100m 
+            memory: 100Mi
+          requests:
+            cpu:  100m
+            memory: 100Mi
+        readinessProbe:
+          failureThreshold: 3
+          httpGet:
+            path: /
+            port: 80
+        volumeMounts:
+        - name: html-file
+          mountPath: /usr/share/nginx/html
+
+      volumes:
+        - name: html-file
+          configMap:
+            name: nginx-configmap
+
+

docs/kubernetes/demo-apps/nginx-custom/Namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: nginx-demo

docs/kubernetes/demo-apps/nginx-custom/Service.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx-service-clusterip
+  namespace: nginx-demo
+spec:
+  selector:
+    app: nginx-app
+  ports:
+  - port: 80
+    targetPort: 80

docs/kubernetes/k8s-resources-type/crds/trivy.md

@@ -0,0 +1,22 @@
+### Trivy
+
+Trivy helps to detect vulnerabilities in your application's dependencies. It is a simple and comprehensive vulnerability scanner for containers and other artifacts.
+
+#### Installation
+
+To install Trivy, you can use the following Helm chart:
+
+```bash
+helm repo add aqua https://aquasecurity.github.io/helm-charts/
+helm repo update
+helm install trivy-operator aqua/trivy-operator --namespace trivy-system --create-namespace --version 0.23.2
+```
+
+#### Uninstallation
+
+To uninstall Trivy, you can use the following Helm command:
+
+```bash
+helm uninstall trivy-operator --namespace trivy-system
+```
+