infra/terraform: add k8s module file for my portfolio

- added k8s module file for my portfolio manifest

infra/terraform/kubernetes/portfolio.tf

@@ -0,0 +1,50 @@
+resource "kubernetes_namespace" "portfolio" {
+  metadata {
+    name = "my-portfolio"
+  }
+}
+
+resource "kubernetes_secret" "docker_secret" {
+  metadata {
+    name      = "docker-registry-credentials"
+    namespace = "my-portfolio"
+  }
+
+  type = "kubernetes.io/dockerconfigjson"
+
+  data = {
+    ".dockerconfigjson" = jsonencode({
+      auths = {
+        "${var.docker_registry_host}" = {
+          username = var.docker_username
+          password = var.docker_password
+          auth     = base64encode("${var.docker_username}:${var.docker_password}")
+        }
+      }
+    })
+  }
+
+  depends_on = [kubernetes_namespace.portfolio]
+}
+
+locals {
+  # Read and process the YAML file with placeholders
+  manifest_content = templatefile("../../../kubernetes/my-portfolio/portfolioManifest.yaml", {
+    PORTFOLIO_HOST  = var.portfolio_host
+    DOCKER_REGISTRY_HOST = var.docker_registry_host
+  })
+  # Split into individual documents
+  manifest_documents = split("---", replace(local.manifest_content, "/\\n\\s*\\n/", "---"))
+}
+
+resource "kubernetes_manifest" "portfolio_manifest" {
+  for_each = { for i, doc in local.manifest_documents : i => doc if trimspace(doc) != "" }
+
+  manifest = yamldecode(each.value)
+
+  field_manager {
+    force_conflicts = true
+  }
+
+  depends_on = [kubernetes_namespace.portfolio]
+}