.actrc: Add configuration for act to run githuc CI actions locally

Signed-off-by: Bernhard Kaindl <bernhard.kaindl@cloud.com>

.actrc

@@ -0,0 +1,13 @@
+--workflows .github/act-serial.yaml
+--platform js-20.04=ghcr.io/catthehacker/ubuntu:js-20.04
+--platform ubuntu-20.04=ghcr.io/catthehacker/ubuntu:act-20.04
+--platform ubuntu-22.04=ghcr.io/catthehacker/ubuntu:act-22.04
+--platform ubuntu-latest=ghcr.io/catthehacker/ubuntu:act-latest
+
+# If using podman, use one of these, preferably in your ~/.actrc:
+# For act-cli.rpm on Fedora 37:
+# --container-daemon-socket /run/user/1000/podman/podman.sock
+# For the latest act, use this in your ~/.actrc:
+# --container-daemon-socket unix:///run/user/1000/podman/podman.sock
+# More information on setting up act can be found at:
+# https://github.com/xenserver/python-libs/blob/master/CONTRIBUTING.md#running-github-actions-locally-using-act