Add docker image and config for local SSO IdP (#2001)

dev/docker-compose.yml

@@ -70,6 +70,20 @@ services:
     profiles:
       - mysql
 
+  idp:
+    image: kenchan0130/simplesamlphp:1.19.3
+    container_name: idp
+    ports:
+      - "8090:8080"
+    environment:
+      SIMPLESAMLPHP_SP_ENTITY_ID: ${IDP_SP_ENTITY_ID}
+      SIMPLESAMLPHP_SP_ASSERTION_CONSUMER_SERVICE: ${IDP_SP_ACS_URL}
+      SIMPLESAMLPHP_SP_SINGLE_LOGOUT_SERVICE: null
+    volumes:
+      - ./authsources.php:/var/www/simplesamlphp/config/authsources.php
+    profiles:
+      - idp
+
 volumes:
   edgesql_dev_data:
   postgres_dev_data: