Establish clean homelab infrastructure baseline

Reorganize the brownfield repository, remove retired and generated artifacts, harden ignore rules, and record the GitOps/IaC redesign.

apps/http-echo/README.md

@@ -0,0 +1,22 @@
+# HTTP Echo (Gateway API workload)
+
+**Purpose**
+- Preserve a tiny HTTP echo `Deployment + Service` as a future GitOps canary.
+- The current `HTTPRoute` still references the retired `contour-gateway`; do not
+  apply this folder until it is migrated and reviewed against Envoy Gateway.
+
+**Resources**
+| File | Description |
+| --- | --- |
+| `deployment.yaml` | Two replicas of `hashicorp/http-echo` returning `hello from contour gateway`. |
+| `service.yaml` | ClusterIP service on port 80 targeted by the route. |
+| `httproute.yaml` | Gateway API `HTTPRoute` that targets `contour-gateway` and the `http-echo` service. |
+
+**How to verify**
+
+Migration and verification are intentionally deferred. Update `parentRefs` to the
+reviewed Envoy Gateway and choose a hostname covered by its listener before apply.
+
+**Notes**
+- This README records the old test intent; the retired Contour manifests are
+  available only in legacy Git history.

apps/http-echo/deployment.yaml

@@ -0,0 +1,24 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: http-echo
+  namespace: default
+  labels:
+    app: http-echo
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: http-echo
+  template:
+    metadata:
+      labels:
+        app: http-echo
+    spec:
+      containers:
+        - name: http-echo
+          image: hashicorp/http-echo:0.2.3
+          args:
+            - '-text=hello from contour gateway'
+          ports:
+            - containerPort: 5678

apps/http-echo/httproute.yaml

@@ -0,0 +1,18 @@
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: http-echo-route
+  namespace: default
+spec:
+  parentRefs:
+    - name: contour-gateway
+  hostnames:
+    - laptop.ddupan.top
+  rules:
+    - matches:
+        - path:
+            type: PathPrefix
+            value: /
+      backendRefs:
+        - name: http-echo
+          port: 80

apps/http-echo/service.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: http-echo
+  namespace: default
+spec:
+  selector:
+    app: http-echo
+  ports:
+    - name: http
+      port: 80
+      targetPort: 5678