Github Actions workflow fails when running steps in a container - docker

Question

I've just started setting up a Github-actions workflow for one of project.I attempted to run the workflow steps inside a container with this workflow definition:
name: TMT-Charts-CI
on:
push:
branches:
- master
- actions-ci
jobs:
build:
runs-on: ubuntu-latest
container:
image: docker://alpine/helm:2.13.0
steps:
- name: Checkout Code
uses: actions/checkout#v1
- name: Validate and Upload Chart to Chart Museum
run: |
echo "Hello, world!"
export PAGER=$(git diff-tree --no-commit-id --name-only -r HEAD)
echo "Changed Components are => $PAGER"
export COMPONENT="NOTSET"
for CHANGE in $PAGER; do ENV_DIR=${CHANGE%%/*}; done
for CHANGE in $PAGER; do if [[ "$CHANGE" != .* ]] && [[ "$ENV_DIR" == "${CHANGE%%/*}" ]]; then export COMPONENT="$CHANGE"; elif [[ "$CHANGE" == .* ]]; then echo "Not a Valid Dir for Helm Chart" ; else echo "Only one component per PR should be changed" && exit 1; fi; done
if [ "$COMPONENT" == "NOTSET" ]; then echo "No component is changed!" && exit 1; fi
echo "Initializing Component => $COMPONENT"
echo $COMPONENT | cut -f1 -d"/"
export COMPONENT_DIR="${COMPONENT%%/*}"
echo "Changed Dir => $COMPONENT_DIR"
cd $COMPONENT_DIR
echo "Install Helm and Upload Chart If Exists"
curl -L https://git.io/get_helm.sh | bash
helm init --client-only
But Workflow fails stating the container stopped due immediately.
I have tried many images including "alpine:3.8" image described in official documentation, but container stops.
According to Workflow syntax for GitHub Actions, in the Container section: "A container to run any steps in a job that don't already specify a container." My assumption is that the container would be started and the steps would be run inside the Docker container.

Answer 1

We can achieve this my making custom docker images, Actually Github runners somehow stops the running container after executing the entrypoint command, I made docker image with entrypoint the make container alive, so container doesn't die after start.
Here is the custom Dockerfile (https://github.com/rizwan937/Helm-Image)
You can publish this image to dockerhub and use it in workflow file like
container:
image: docker://rizwan937/helm
You can add this entrypoint to any docker image so that It remains alive for further steps execution.
This is a temporary solution, if anyone have better one, let me know.