Deployment: Added `gl-install` (#4805)

* Pre-release: Added Keycloak.

* Pre-release: Added `gl-install`.

docker-compose.kc.yml

+
+  keycloak:
+    command: start
+    image: quay.io/keycloak/keycloak:20.0
+    container_name: keycloak
+    restart: unless-stopped
+    environment:
+      - KEYCLOAK_ADMIN=admin
+      - KEYCLOAK_ADMIN_PASSWORD=
+      - KC_DB=postgres
+      - KC_DB_URL_HOST=postgres
+      - KC_DB_USERNAME=postgres
+      - KC_DB_URL_DATABASE=keycloakdb
+      - KC_DB_PASSWORD=
+      - KC_HOSTNAME_STRICT=false
+      - KC_HTTP_RELATIVE_PATH=/keycloak
+      - KC_PROXY=edge
+    ports:
+      - 127.0.0.1:5151:8080
+    logging:
+      driver: journald
+    depends_on:
+      - postgres

keycloak.nginx

+### Keycloak:
+
+location /keycloak {
+    proxy_pass http://127.0.0.1:5151;
+    proxy_redirect off;
+    proxy_read_timeout 60s;
+
+    proxy_set_header Host $http_host;
+    proxy_set_header X-Forwarded-Host $http_host;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_http_version 1.1;
+
+    proxy_headers_hash_max_size 512;
+    proxy_headers_hash_bucket_size 128;
+
+    proxy_buffer_size 128k;
+    proxy_buffers 4 256k;
+    proxy_busy_buffers_size 256k;
+
+}