Update docs for rootless fixes

.forgejo/workflows/ipv6test.yml

@@ -12,5 +12,6 @@ jobs:
       image: ubuntu:24.04
     steps:
       - run: |
-          apt update; apt install --yes curl
+          apt-get update
+          apt-get install --yes curl
           curl -s -o /dev/null https://ipv6.google.com

docs/forgejo-runner.service

@@ -7,6 +7,7 @@ After=podman-socket.service
 ExecStart=/home/forgejo-runner/.local/bin/forgejo-runner daemon
 ExecReload=/bin/kill -s HUP $MAINPID
 WorkingDirectory=/home/forgejo-runner
+EnvironmentFile=/home/forgejo-runner/.runner-env
 
 Restart=on-failure
 TimeoutSec=0

docs/hosting-runners.md

@@ -20,8 +20,9 @@ loginctl enable-linger forgejo-runner
 ```bash
 # As root
 apt install -y podman
-echo "forgejo-runner:10000:12000" >> /etc/subuid
+
-echo "forgejo-runner:10000:12000" >> /etc/subgid
+# Expand the subuid/subgid namespaces for the user, the default one is too small for privileged rootless-containers
+usermod --add-subuids 100000-200000 --add-subgids 100000-200000 forgejo-runner
 ```
 
 #### Enable Podman docker-socket on user
@@ -85,8 +86,14 @@ forgejo-runner register --instance "$RUNNER_INST_URL" --name "$RUNNER_NAME" --to
 
 ```bash
 # As forgejo-runner
+echo "XDG_RUNTIME_DIR=/run/user/$(id -u)" > .runner-env
+echo "DOCKER_HOST=unix:///run/user/$(id -u)/podman/podman.sock" >> .runner-env
+
 mkdir -p ~/.config/systemd/user
 # Download the file "docs/forgejo-runner.service" from this repository to "~/.config/systemd/user"
+# Or create a new file there and paste the contents.
+
+
 systemctl --user enable --now forgejo-runner
 # View logs by using:
 journalctl -xe --user-unit=forgejo-runner