ci(deploy): map main branch to staging environment automatically

.gitea/workflows/deploy.yml

@@ -90,10 +90,10 @@ jobs:
           PRJ="etib"
 
           if [[ "${{ github.ref_type }}" == "branch" && "$REF" == "main" ]]; then
-            TARGET="testing"
+            TARGET="staging"
             IMAGE_TAG="main-${SHORT_SHA}"
-            ENV_FILE=".env.testing"
-            TRAEFIK_HOST="test.${DOMAIN}"
+            ENV_FILE=".env.staging"
+            TRAEFIK_HOST="staging.${DOMAIN}"
           elif [[ "${{ github.ref_type }}" == "tag" ]]; then
             if [[ "$REF" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
               TARGET="production"