add OCIS_URL env var

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

proxy/pkg/command/server.go

@@ -4,13 +4,14 @@ import (
 	"context"
 	"crypto/tls"
 	"fmt"
-	"github.com/owncloud/ocis/proxy/pkg/user/backend"
 	"net/http"
 	"os"
 	"os/signal"
 	"strings"
 	"time"
 
+	"github.com/owncloud/ocis/proxy/pkg/user/backend"
+
 	"contrib.go.opencensus.io/exporter/jaeger"
 	"contrib.go.opencensus.io/exporter/ocagent"
 	"contrib.go.opencensus.io/exporter/zipkin"
@@ -55,7 +56,9 @@ func Server(cfg *config.Config) *cli.Command {
 				return err
 			}
 
-			return ParseConfig(ctx, cfg)
+			if err := ParseConfig(ctx, cfg); err != nil {
+				return err
+			}
 		},
 		Action: func(c *cli.Context) error {
 			logger := NewLogger(cfg)

proxy/pkg/flagset/flagset.go

@@ -199,7 +199,7 @@ func ServerWithConfig(cfg *config.Config) []cli.Flag {
 			Name:        "oidc-issuer",
 			Value:       "https://localhost:9200",
 			Usage:       "OIDC issuer",
-			EnvVars:     []string{"PROXY_OIDC_ISSUER"},
+			EnvVars:     []string{"PROXY_OIDC_ISSUER", "OCIS_URL"}, // PROXY_OIDC_ISSUER takes precedence over OCIS_URL
 			Destination: &cfg.OIDC.Issuer,
 		},
 		&cli.BoolFlag{