Add demo WF for IpPv6 test

- No systemd session is available for podman in crontab entries and there appears to be no proper way to get one without a PTY...

.editorconfig

@@ -6,3 +6,6 @@ insert_final_newline = true
 charset = utf-8
 indent_style = space
 indent_size = 4
+
+[*.yml]
+indent_size = 2

.forgejo/workflows/ipv6test.yml

@@ -0,0 +1,14 @@
+---
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+    ipv6:
+        runs-on: docker
+        steps:
+            - run: |
+                  apt update; apt install --yes curl
+                  curl -s -o /dev/null https://ipv6.google.com

docs/hosting-runners.md

@@ -33,19 +33,10 @@ machinectl shell --uid forgejo-runner # <-- This is basically "sudo -Hi XXX" but
 ```
 
 ```bash
-systemctl enable --user podman.socket
+systemctl --user enable --now podman.socket podman
 echo 'export DOCKER_HOST=unix://$XDG_RUNTIME_DIR/podman/podman.sock' >> ~/.profile
 ```
 
-#### Automatic podman cleanup on reboot
-
-```bash
-crontab -e
-```
-```cronexp
-@reboot podman system cleanup --all --force
-```
-
 ### 4. Install the forgejo-runner
 
 ```bash
@@ -74,6 +65,7 @@ Or, if you're volunteering another runner for our instance, please contact us to
 ```bash
 # As forgejo-runner
 forgejo-runner generate-config > config.yml
+# You should open the config.yml and enable IPv6 support! (Your cloud host might charge extra for IPv4 connectivity)
 
 # We're about to enter secrets into the terminal, disable history:
 set +o history