Fix: strip leading whitespace from .env.prod in deploy workflow

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -13,7 +13,7 @@ jobs:
 
       - name: Write .env.prod
         run: |
-          cat > .env.prod << 'ENVEOF'
+          cat > .env.prod <<'ENVEOF'
           POSTGRES_USER=${{ secrets.POSTGRES_USER }}
           POSTGRES_PASSWORD=${{ secrets.POSTGRES_PASSWORD }}
           POSTGRES_DB=${{ secrets.POSTGRES_DB }}
@@ -22,6 +22,7 @@ jobs:
           ADMIN_PASSWORD=${{ secrets.ADMIN_PASSWORD }}
           LETSENCRYPT_EMAIL=${{ secrets.LETSENCRYPT_EMAIL }}
           ENVEOF
+          sed -i 's/^[[:space:]]*//' .env.prod
 
       - name: Build and deploy
         run: |