update repository to 6.1.2-ga, SSO example (#914)

* remove old compose, update to 6.1.2-ga

* SSO with vanilla keycloak

docker/nginx.conf

@@ -0,0 +1,29 @@
+server {
+    listen *:80;
+
+    set  $allowOriginSite *;
+    proxy_pass_request_headers on;
+    proxy_pass_header Set-Cookie;
+
+    access_log off;
+
+    proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
+    proxy_redirect off;
+    proxy_buffering off;
+    proxy_set_header Host            $host;
+    proxy_set_header X-Real-IP       $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_pass_header Set-Cookie;
+
+    location / {
+      proxy_pass http://content-app;
+    }
+
+    location /alfresco/ {
+      proxy_pass http://alfresco:8080;
+    }
+
+    location /share/ {
+      proxy_pass http://share:8080;
+    }
+}