Added Cockroach DB (for testing).

.gitignore

@@ -1,3 +1,3 @@
 postgres/data-12/
 mysql/data/
-
+cockroachdb/data/

cockroachdb/docker-compose.yml

@@ -0,0 +1,20 @@
+version: "3"
+
+services:
+  cockroachdb1:
+    container_name: cockroachdb1
+    image: cockroachdb/cockroach:latest
+    volumes:
+      - /home/marvin/docker/cockroachdb/data/node1:/cockroach/cockroach-data
+    command: start-single-node --insecure
+    ports:
+      - "26257:26257"
+      - "12345:8080"
+    networks:
+      cockroachdb_net:
+        aliases:
+          - cockroachdb1
+
+networks:
+  cockroachdb_net:
+    driver: bridge