feat: add GitHub Action for deployment notifications via ntfy and Gmail SMTP

notify.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+set -e
+
+ICON="🚀"
+if [ "$STATUS" = "failure" ]; then
+  ICON="❌"
+fi
+
+# ---- ntfy ----
+if [ -n "$NTFY_URL" ] && [ -n "$NTFY_TOPIC" ]; then
+  curl -s -X POST "$NTFY_URL/$NTFY_TOPIC" \
+    -H "Title: $ICON $TITLE" \
+    -H "Priority: 4" \
+    -d "$MESSAGE"
+fi
+
+# ---- Gmail SMTP ----
+if [ -n "$GMAIL_USER" ] && [ -n "$GMAIL_TO" ]; then
+  {
+    echo "Subject: $ICON $TITLE"
+    echo "From: $GMAIL_USER"
+    echo "To: $GMAIL_TO"
+    echo ""
+    echo "$MESSAGE"
+  } | sendmail -S smtp.gmail.com:587 \
+      -au"$GMAIL_USER" \
+      -ap"$GMAIL_PASS" \
+      "$GMAIL_TO"
+fi