Add keycloak

roles/keycloak/README.md

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+Installs keycloak in docker

roles/keycloak/meta/main.yml

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+---
+
+dependencies:
+  - role: container
+    docker_service: keycloak
+    docker_image: quay.io/keycloak/keycloak:latest
+    docker_image_http_port: 8080
+    docker_database: postgres
+    docker_entrypoint: 
+      - /opt/keycloak/bin/kc.sh
+      - start
+      - --auto-build
+    docker_env:
+      KEYCLOAK_ADMIN: admin
+      KEYCLOAK_ADMIN_PASSWORD: "{{ keycloak_admin_pw }}"
+      KC_HOSTNAME: "{{ docker_vhost_domains.keycloak[0] }}"
+      KC_HTTP_ENABLED: "true"
+      KC_DB: postgres
+      KC_DB_URL: jdbc:postgresql://keycloak_db/keycloak
+      KC_DB_USERNAME: keycloak
+      KC_DB_PASSWORD: "{{ database_passwords.keycloak }}"
+