auth-proxy: proxies only authenticated requests to upstream, redirects to login page otherwise (#103)

* auth-proxy: inspects authenticated user

* ingress: chart and use in rpuppy

* auth-proxy: make it optional in rpuppy

* kratos: whitelist env pub/priv domains for auth return_to addr

* url-shortener: put behind auth-proxy

* pihole: replace oauth2-client with auth-proxy

* auth-proxy: fix upstream uri generation

* pihole: remove old chart using oauth2

* auth-proxy: remove temporary values file

* url-shortener: check x-user header for authentication

* auth: fix allowed_return_urls list

* auth-proxy: fix current address generation logic

---------

Co-authored-by: Giorgi Lekveishvili <lekva@gl-mbp-m1-max.local>
diff --git a/charts/pihole/templates/ingress.yaml b/charts/pihole/templates/ingress.yaml
new file mode 100644
index 0000000..fb5a081
--- /dev/null
+++ b/charts/pihole/templates/ingress.yaml
@@ -0,0 +1,38 @@
+{{- if .Values.ingress.enabled -}}
+{{- $serviceName := printf "%s-%s" (include "pihole.fullname" .) "web" -}}
+{{- $ingressPath := .Values.ingress.path -}}
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: {{ template "pihole.fullname" . }}
+  labels:
+    app: {{ template "pihole.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+{{- if .Values.ingress.ingressClassName }}
+  ingressClassName: {{ .Values.ingress.ingressClassName }}
+{{- end }}
+{{- if .Values.ingress.tls }}
+  tls:
+{{ toYaml .Values.ingress.tls | indent 4 }}
+{{- end }}
+  rules:
+  {{- range .Values.ingress.hosts }}
+    - host: {{ . | quote }}
+      http:
+        paths:
+          - path: {{ $ingressPath }}
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: {{ $serviceName }}
+                port: 
+                  name: http
+  {{- end }}
+{{- end }}