feat: Add a new step to the deploy pipeline to update Kubernetes manifests with the latest image tag.

Reviewed-on: #2

.drone.yml

@@ -1,42 +1,62 @@
 kind: pipeline
 type: kubernetes
 name: pr-check
+
 trigger:
-    event:
-        - pull_request
+  event:
+    - pull_request
 
 steps:
-    - name: build-angular
-      image: node:22-alpine
-      commands:
-          - npm ci
-          - npm run build
+  - name: build-angular
+    image: node:22-alpine
+    commands:
+      - npm ci
+      - npm run build
 
 ---
 kind: pipeline
 type: kubernetes
 name: deploy
+
 trigger:
-    branch:
-        - main
-    event:
-        - push
+  branch:
+    - main
+  event:
+    - push
 
 steps:
-    - name: build-angular
-      image: node:22-alpine
-      commands:
-          - npm ci
-          - npm run build
+  - name: build-angular
+    image: node:22-alpine
+    commands:
+      - npm ci
+      - npm run build
 
-    - name: build-and-push
-      image: plugins/docker
-      settings:
-          registry: gitea.mnky-code.de
-          repo: gitea.mnky-code.de/mnky/ngrx-playground
-          tags:
-              - ${DRONE_COMMIT_SHA}
-          username:
-              from_secret: gitea_username
-          password:
-              from_secret: gitea_password
+  - name: build-and-push
+    image: plugins/docker
+    settings:
+      registry: gitea.mnky-code.de
+      repo: gitea.mnky-code.de/mnky/ngrx-playground
+      tags:
+        - ${DRONE_COMMIT_SHA}
+      username:
+        from_secret: gitea_username
+      password:
+        from_secret: gitea_password
+
+  - name: update-manifests
+    image: alpine:3.20
+    environment:
+      GITEA_USERNAME:
+        from_secret: gitea_username
+      GITEA_PASSWORD:
+        from_secret: gitea_password
+    commands:
+      - apk add --no-cache git sed
+      - git clone https://gitea.mnky-code.de/mnky/k8s-manifests.git
+      - cd k8s-manifests
+      - sed -i "s|image: gitea.mnky-code.de/mnky/ngrx-playground:.*|image: gitea.mnky-code.de/mnky/ngrx-playground:${DRONE_COMMIT_SHA}|" ngrx-playground/deployment.yaml
+      - git config user.name "drone"
+      - git config user.email "drone@mnky-code.de"
+      - git add ngrx-playground/deployment.yaml
+      - git commit -m "Deploy ngrx-playground ${DRONE_COMMIT_SHA}" || exit 0
+      - git push https://${GITEA_USERNAME}:${GITEA_PASSWORD}@gitea.mnky-code.de/mnky/k8s-manifests.git HEAD:main