Added Base for implementing LDAP and SSO with docker compose in later steps

roles/docker-ldap-sso/README.md

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+# Draft Docker LDAP and SSO
+Draft role for an LDAP implementation with sso. 
+## See
+- [ChatGPT Conversation](https://chat.openai.com/share/77919994-5d44-4a64-877d-b572d67483d4)
+- [Discouse Documentation](https://forum.veen.world/t/cymais-ldap-implementierung-documentation/49)

roles/docker-ldap-sso/templates/docker-compose.yml.j2

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+version: '3'
+
+services:
+  openldap:
+    image: osixia/openldap:1.2.4
+    environment:
+      - LDAP_ORGANISATION=MeineFirma
+      - LDAP_DOMAIN=meinefirma.de
+      - LDAP_ADMIN_PASSWORD=admin
+    ports:
+      - "389:389"
+      - "636:636"
+    volumes:
+      - ./ldap:/var/lib/ldap
+      - ./ldap-slapd:/etc/ldap/slapd.d
+
+  keycloak:
+    image: jboss/keycloak:latest
+    environment:
+      - KEYCLOAK_USER=admin
+      - KEYCLOAK_PASSWORD=admin
+      - DB_VENDOR=h2
+    ports:
+      - "8080:8080"
+    depends_on:
+      - openldap