add redis

redis/README.md

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+redis
+=====
+
+![](https://redis.io/images/redis-white.png)
+
+[Redis][1] is an open source key-value store that functions as a data structure server.
+
+## docker-compose.yml
+
+```yaml
+redis:
+  image: redis:alpine
+  ports:
+    - "127.0.0.1:6379:6379"
+  volumes:
+    - ./data:/data
+  restart: always
+```
+
+[1]: https://redis.io/

redis/docker-compose.yml

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+redis:
+  image: redis:alpine
+  ports:
+    - "127.0.0.1:6379:6379"
+  volumes:
+    - ./data:/data
+  restart: always