Add convenience script and makefile for hacking

makefile

@@ -0,0 +1,17 @@
+default: run
+
+run:  ## run a new container
+	@docker run \
+  -p 8080:8080 \
+  -v $$(pwd)/lumbung.space:/opt/jboss/keycloak/themes/lumbung.space \
+	-v $$(pwd)/bin/disable-theme-cache.cli:/opt/jboss/startup-scripts/disable-theme-cache.cli \
+  -e KEYCLOAK_USER=admin \
+  -e KEYCLOAK_PASSWORD=admin \
+	--name keycloakdev \
+  jboss/keycloak:12.0.4
+
+shell:  ## get a shell in the container
+	@docker exec -it keycloakdev /bin/bash
+
+stop:  ## tear down the container
+	@docker stop keycloakdev && docker rm keycloakdev