docs(README.md): add notice of final release and maintenance mode

Merge pull request #354 from mboersma/update-nginx

chore(Dockerfile): update nginx to 1.13.4

Merge pull request #350 from wuvs/master

chore(Dockerfile): update nginx to 1.13.3

Merge pull request #344 from Bregor/features/rbac

RBAC support

Merge pull request #340 from wuvs/update-nginx

chore(Dockerfile): update nginx to 1.13.0

Merge pull request #316 from kris-nova/byo-ingress

feat(ingress) Experimental Native Ingress

Merge pull request #323 from krancour/feat/proxy_buffer_size

feat(proxyBuffers): Add router-level and app-level proxy buffer config options

Merge pull request #311 from metadave/dp_router_requests

feat(charts): add resource requests to chart

Merge pull request #303 from bacongobbler/remove-annotation-keys

fix(charts): remove deployment and service annotations

Merge pull request #298 from bacongobbler/enable-by-default

fix(charts): enable hostports by default