Don't always build backup db image

.github/workflows/db-backup.yml

@@ -0,0 +1,18 @@
+name: Docker image builds
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - containers/backup-db/**
+  workflow_dispatch:
+
+jobs:
+  backup-db:
+    uses: ./.github/workflows/docker-build.yml
+    with:
+      name: "db-backup"
+      username: "ajayyy"
+      folder: "./containers/backup-db"
+    secrets:
+      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/sb-server.yml

@@ -21,13 +21,5 @@ jobs:
       name: "rsync-host"
       username: "ajayyy"
       folder: "./containers/rsync"
-    secrets:
-      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-  backup-db:
-    uses: ./.github/workflows/docker-build.yml
-    with:
-      name: "db-backup"
-      username: "ajayyy"
-      folder: "./containers/backup-db"
     secrets:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}