fix nginx template

deploy/1_set_keycloak_hosts.sh

 #!/bin/sh
-if [ -n "${KEYCLOAK_HOSTNAME}" ]; then
-    echo "server {
+if [ -n "\${KEYCLOAK_HOSTNAME}" ]; then
+    echo "
+server {
   listen 80;
-  server_name ${KEYCLOAK_HOSTNAME};  location / {
-      proxy_pass ${KEYCLOAK_INTERNAL_URL};
-      proxy_set_header    Host $host;
+  server_name \${KEYCLOAK_HOSTNAME};  location / {
+      proxy_pass \${KEYCLOAK_INTERNAL_URL};
+      proxy_set_header    Host \$host;
       proxy_connect_timeout 30;
       proxy_send_timeout 30;
   }

package.json

 {
   "name": "misis-frontend",
-  "version": "0.4.4",
+  "version": "0.4.5",
   "scripts": {
     "ng": "ng",
     "start": "ng serve",