Add generic dockerfile for github runners based on ubuntu

Signed-off-by: Christian Richter <crichter@suse.com>

ghrunner/Dockerfile

@@ -0,0 +1,14 @@
+FROM ubuntu:latest
+COPY entrypoint.sh /
+ENV TZ=Europe/Berlin
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get -y install \
+    curl \
+    libdigest-sha-perl \
+    tzdata
+RUN useradd -ms /bin/bash runner
+WORKDIR /runner
+RUN chown runner:runner /runner -Rfv
+ENTRYPOINT ["/entrypoint.sh"]
+

ghrunner/entrypoint.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+ARCH=${ARCH:-x64}
+VERSION=${VERSION:-2.280.3}
+CHECKSUM=${CHECKSUM:-69dc323312e3c5547ba1e1cc46c127e2ca8ee7d7037e17ee6965ef6dac3c142b}
+ORG=${ORG:-dragonchaser}
+REPO=${REPO:-dockerhub-autobuild}
+OS=${OS:-linux}
+
+if [ -z "${TOKEN}" ]; then
+    echo "MISSING TOKEN, BAILING OUT!"
+    exit 1
+fi
+
+FILE="actions-runner-${OS}-${ARCH}-${VERSION}.tar.gz"
+curl -o ${FILE} -L https://github.com/actions/runner/releases/download/v${VERSION}/${FILE}
+echo "${CHECKSUM}  ${FILE}" | shasum -a 256 -c
+tar xzf ./${FILE}
+./bin/installdependencies.sh
+su runner -c "./config.sh --unattended --url https://github.com/${ORG}/${REPO} --token ${TOKEN} --name docker-runner-$(hostname)"
+su runner -c "./run.sh"