[Platform] Added HTTP to HTTPS redirection in nginx conf (#127)

* [Platform] Added HTTP to HTTPS redirection in nginx conf

In a few of the SSO or OIDC integration, after integration, it redirects to the HTTP.
And previously, we disabled the HTTP traffic totally once we enabled the TLS.
But after these changes, it'll redirect the HTTP traffic to HTTPS in case TLS enabled deployment.

* Added HSTS header and modified the proxy_set_header for proto

stable/yugaware/templates/configs.yaml

@@ -155,6 +155,15 @@ metadata:
     heritage: {{ .Values.helm2Legacy | ternary "Tiller" (.Release.Service | quote) }}
 data:
   default.conf: |
+{{- if .Values.tls.enabled }}
+    # Ref: https://www.nginx.com/blog/http-strict-transport-security-hsts-and-nginx/
+    server {
+      listen  {{ eq .Values.ip_version_support "v6_only" | ternary "[::]:8080" "8080" }};
+      server_name {{ .Values.tls.hostname }};
+      return  301  https://$host$request_uri;
+    }  
+{{- end }}
+
     server {
 {{- if .Values.tls.enabled }}
       listen       8443 ssl;
@@ -164,13 +173,15 @@ data:
       ssl_protocols {{ include "validate_nginx_ssl_protocols" . }};
 {{- end }}
       server_name  {{ .Values.tls.hostname }};
+      add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
 {{- else }}
       listen       {{ eq .Values.ip_version_support "v6_only" | ternary "[::]:8080" "8080" }};
       server_name  {{ .Values.tls.hostname }};
 {{- end }}
       proxy_http_version 1.1;
       proxy_set_header X-Real-IP  $remote_addr;
-      proxy_set_header X-Forwarded-For $remote_addr;
+      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+      proxy_set_header X-Forwarded-Proto $scheme;
       proxy_set_header Host $host;
 
       location / {

stable/yugaware/templates/service.yaml

@@ -24,14 +24,14 @@ spec:
 {{- end }}
 {{- end }}
   ports:
-  - name: ui
 {{- if .Values.tls.enabled }}
+  - name: ui-tls
     port: 443
     targetPort: 8443
-{{- else }}
+{{- end }}
+  - name: ui
     port: 80
     targetPort: 8080
-{{- end }}
   - name: metrics
     port: 9090
   selector: