Auto deploy

[applejag]

Followed this guide: https://jamiemagee.co.uk/blog/how-to-host-your-helm-chart-repository-on-github/

Changes to CI pipeline

• Added linting of chart using "chart-testing" (https://github.com/helm/chart-testing)
• Added linting of autogenerated chart README.md using "helm-docs" (https://github.com/norwoodj/helm-docs)
• Added test installing of chart into Kubernetes-in-Docker cluster using "kind" (https://github.com/kubernetes-sigs/kind)
• Added Kubernetes schema validation using kubeval (https://github.com/instrumenta/kubeval)
• Added auto chart releases using "chart-releaser" (https://github.com/helm/chart-releaser)

Changes to wharf-helm chart

• Moved wharf-helm chart into charts/ dir
• Added some metadata to charts/wharf-helm/Chart.yaml
• Added charts/wharf-helm/ci/test-values.yaml for "chart-testing"
• Added hotfixes until #6 is merged
• Added configurability of readinessProbe & livenessProbe for API & web
• Changed CHANGELOG.md, we no longer have dates

Other changes

• Disabled "remark-lint-maximum-line-length" in charts/ dir as we're using autogenerated docs via helm-docs
• Updated docs in README.md a lot

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Closes #5

[applejag]

@Pikabanga I'll let you resolve the discussions here if you find the answers adequate