✨(keycloak) add keycloak as auth server

Keycloak is a open source identity and access management
for modern applications and services.
- add keycloak server in docker-compose
- add keycloak in frontend

env.d/development/kc_postgresql.dist

@@ -0,0 +1,11 @@
+# Postgresql db container configuration
+POSTGRES_DB=keycloak
+POSTGRES_USER=people
+POSTGRES_PASSWORD=pass
+
+# App database configuration
+DB_HOST=kc_postgresql
+DB_NAME=keycloak
+DB_USER=people
+DB_PASSWORD=pass
+DB_PORT=5433