fix(deploy): add App__BaseUrl env var for activation URLs

The activation URL was incorrectly pointing to localhost:4200 in production
because App:BaseUrl configuration was missing. Added the environment variable
to both K3s and Docker Compose deployments.

Fixes: Activation URL shows http://localhost:4200 instead of production domain

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

deploy/docker/docker-compose.yml

@@ -44,6 +44,7 @@ services:
       - ConnectionStrings__DefaultConnection=Server=db;Database=${DB_NAME:-StudentEnrollment};User Id=${DB_USER:-sa};Password=${DB_PASSWORD};TrustServerCertificate=True;Max Pool Size=50;Min Pool Size=2
       - ASPNETCORE_ENVIRONMENT=${ASPNETCORE_ENVIRONMENT:-Development}
       - CORS_ORIGINS=${CORS_ORIGINS:-http://localhost:8080,http://localhost:4200}
+      - App__BaseUrl=${APP_BASE_URL:-http://localhost:8080}
       - DOTNET_gcServer=0
       - DOTNET_GCHeapCount=2
       - DOTNET_gcConcurrent=1

deploy/k3s/api.yaml

@@ -51,6 +51,8 @@ spec:
               value: "9"
             - name: CORS_ORIGINS
               value: "https://academia.ingeniumcodex.com"
+            - name: App__BaseUrl
+              value: "https://academia.ingeniumcodex.com"
           resources:
             requests:
               memory: "128Mi"