Issue #28: Created a file in docs with basic valkey commands

Signed-off-by: bota <[email protected]>

Author: SergiuBota1

docs/book/v1/valkey.md

@@ -0,0 +1,61 @@
+## Valkey usage
+
+Valkey is an open source (BSD) high-performance key/value datastore that supports a variety of workloads such as caching, message queues, and can act as a primary database.
+
+The following commands can be run in the CLI to interact with Valkey. To enter CLI run:
+
+`valkey-cli`
+
+### Utility Commands
+
+List all keys matching a pattern.
+
+`KEYS *`
+
+Get server information and statistics.
+
+`INFO`
+
+Check if the server is running.
+
+`PING`
+
+Delete all keys in all databases
+
+`FLUSHALL`
+
+Check data type stored at a specific key (Possible types: string, list, set, zset, hash, stream)
+
+`TYPE keyName`
+
+### Key-Value Operations
+
+Set a string key to a value.
+
+`SET keyName "keyValue"`
+
+Get the value of a key.
+
+`GET keyName`
+
+Delete one or more keys.
+
+`DEL keyName1 keyName2`
+
+### Stream Commands
+
+Read entries from a stream oldest to newest (revers '-' and '+' to reverse order).
+
+`XRANGE streamName - +`
+
+Delete stream
+
+`DEL streamName`
+
+Remove all stream entries and keep stream key
+
+`XTRIM streamName MAXLEN 0`
+
+Delete specific entry
+
+`XDEL streamName <entryId>`