Lint charts locally without installing Helm:
# Using chart-testing
docker run --rm -v ${PWD}:/repo -w /repo \
quay.io/helmpack/chart-testing \
ct lint --charts chart --validate-maintainers=false
# Alternative with helm3-ci
docker run --rm -v ${PWD}:/repo -w /repo \
ventx/helm3-ci:latest \
ct lint --charts chart --validate-maintainers=false
Note: Replace ${PWD} with $(pwd) on Linux/Mac or use absolute path on Windows.