REFACTOR(apps): migrate to app-template

- docusaurus: Replace with app-template, configmap in manifests/
- homer: Replace with app-template, configMapGenerator for config.yml
- crafty: Replace with app-template, pvc/ingress/service in manifests/
- mas: Replace with app-template, rbac/external-secret in manifests/
- All apps use app-template chart v3.6.1

docusaurus/manifests/configmap.yaml

@@ -0,0 +1,40 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: nginx-config
+  namespace: docusaurus
+data:
+  default.conf: |
+    server {
+        listen 80;
+        server_name _;
+        root /usr/share/nginx/html;
+        index index.html;
+
+        # Enable gzip compression
+        gzip on;
+        gzip_vary on;
+        gzip_min_length 1024;
+        gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/javascript application/json;
+
+        # Redirect root to intro page
+        location = / {
+            return 301 /intro/;
+        }
+
+        # SPA fallback
+        location / {
+            try_files $uri $uri/ /intro/index.html;
+        }
+
+        # Cache static assets
+        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+            expires 1y;
+            add_header Cache-Control "public, immutable";
+        }
+
+        # Security headers
+        add_header X-Frame-Options "SAMEORIGIN" always;
+        add_header X-Content-Type-Options "nosniff" always;
+        add_header X-XSS-Protection "1; mode=block" always;
+    }