feat: Initial Matrix server setup with Postgres, Element, and Keycloak OIDC

.env.example

@@ -0,0 +1,12 @@
+# Ports
+SYNAPSE_PORT=8008
+ELEMENT_PORT=8088
+
+# PostgreSQL Configuration
+POSTGRES_DB=synapse
+POSTGRES_USER=synapse
+POSTGRES_PASSWORD=generate_a_secure_password_here
+
+# Keycloak OIDC Configuration
+# Erstelle einen confidential Client namens 'matrix' im Keycloak auth.mischlabs.de
+KEYCLOAK_CLIENT_SECRET=your_keycloak_client_secret_here