Update build workflow and add .actrc

.actrc

@@ -0,0 +1,2 @@
+-P ubuntu-latest=catthehacker/ubuntu:act-latest
+--artifact-server-path=/tmp/act-artifacts

.gitea/workflows/build.yml

@@ -40,7 +40,7 @@ jobs:
     name: Validate (composer + pint)
     runs-on: ubuntu-latest
     container:
-      image: php:8.3-cli
+      image: mcr.microsoft.com/devcontainers/php:8.3
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -86,7 +86,7 @@ jobs:
     name: Test (PHPUnit)
     runs-on: ubuntu-latest
     container:
-      image: php:8.3-cli
+      image: mcr.microsoft.com/devcontainers/php:8.3
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -204,7 +204,7 @@ jobs:
     name: Security audit
     runs-on: ubuntu-latest
     container:
-      image: php:8.3-cli
+      image: mcr.microsoft.com/devcontainers/php:8.3
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -251,7 +251,7 @@ jobs:
     name: Deploy to shared hosting (PHP)
     runs-on: ubuntu-latest
     container:
-      image: php:8.3-cli
+      image: mcr.microsoft.com/devcontainers/php:8.3
     if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master'
     needs: [test, build, security]
     environment: