feat: add artifactapi3 application

Deploy artifactapi v3 with separate API and UI deployments, CNPG
PostgreSQL cluster with pooler, and Redis. Routes traffic via
Gateway API for artifactapi.main.unkin.net and
artifactapi3.k8s.syd1.au.unkin.net.

apps/base/artifactapi3/configmap.yaml

@@ -0,0 +1,16 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: api-env
+  namespace: artifactapi3
+data:
+  DBHOST: postgres-pooler
+  DBNAME: artifacts
+  DBPORT: "5432"
+  DBUSER: artifacts
+  MINIO_BUCKET: artifactapi-prod-k8s-syd1-au
+  MINIO_ENDPOINT: radosgw.service.consul
+  MINIO_SECURE: "true"
+  REDIS_URL: redis://redis:6379
+  SSL_CERT_FILE: /etc/ssl/combined/ca-certificates.crt