implemented docker compose for keycloak

roles/docker-keycloak/templates/docker-compose.yml.j2

@@ -0,0 +1,32 @@
+version: '3.7'
+
+services:
+
+# include database container
+{% include 'templates/docker/services/' + database_type + '.yml.j2' %}
+
+  keycloak:
+    image: quay.io/keycloak/keycloak:23.0.6
+    command: start
+    environment:
+      KC_HOSTNAME: {{domain}}
+      KC_HOSTNAME_PORT: {{http_port}}
+      KC_HOSTNAME_STRICT_BACKCHANNEL: false
+      KC_HTTP_ENABLED: true
+      KC_HOSTNAME_STRICT_HTTPS: false
+      KC_HEALTH_ENABLED: true
+      KEYCLOAK_ADMIN: ${KEYCLOAK_ADMIN}
+      KEYCLOAK_ADMIN_PASSWORD: ${KEYCLOAK_ADMIN_PASSWORD}
+      KC_DB: postgres
+      KC_DB_URL: jdbc:postgresql://postgres/${POSTGRES_DB}
+      KC_DB_USERNAME: ${POSTGRES_USER}
+      KC_DB_PASSWORD: ${POSTGRES_PASSWORD}
+    ports:
+      - "127.0.0.1:{{http_port}}:8080"
+    restart: always
+{% include 'templates/docker/container/depends-on-just-database.yml.j2' %}
+{% include 'templates/docker/container/networks.yml.j2' %}
+
+{% include 'templates/docker/compose/volumes.yml.j2' %}
+
+{% include 'templates/docker/compose/networks.yml.j2' %}