feat: add production environment variables and update Gitea workflow for deployment

.gitea/workflows/main.yml

@@ -1,6 +1,9 @@
 name: Main Build & Deploy
 
-on: workflow_dispatch
+on:
+  push:
+    branches:
+      - main
 
 jobs:
   build:
@@ -41,6 +44,9 @@ jobs:
     name: Deploy Live
     runs-on: ubuntu-latest
     needs: build
+    environment:
+      name: production
+      url: https://pet.ivanch.me  # adjust this URL as needed
 
     steps:
     - name: Recreate container