Update workflows

.github/workflows/build.yml

@@ -1,6 +1,9 @@
-name: Build Client & Server
+name: dotnet build
 on:
-  push: {}
+  push:
+    paths:
+      - '**.md'
+      - 'Dockerfile'
 jobs:
   build:
     runs-on: windows-latest

.github/workflows/server.yml

@@ -1,11 +1,13 @@
-name: Create docker image for Server
+name: docker build
 on:
   push:
     branches:
       - master
     paths:
+      - '.github/workflows/server.yml'
       - 'Pal.Common/**'
       - 'Pal.Server/**'
+      - 'Dockerfile'
 permissions:
   packages: write
 jobs: