add ubuntu-latest

gitea-runner/Dockerfile

@@ -0,0 +1,13 @@
+from ubuntu-latest
+
+# Update and install packages
+RUN apt-get update && apt-get install -y \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+RUN echo "Installed packages"
+
+# Install Docker
+RUN wget -q -O /tmp/docker.tgz https://download.docker.com/linux/static/stable/x86_64/docker-20.10.23.tgz \
+    && tar --extract --file /tmp/docker.tgz --directory /usr/bin --strip-components 1 --no-same-owner docker/docker \
+    && rm -rf /tmp/*  
+RUN echo "Installed Docker"