# REST key-val store
Create an API with the following endpoints to create a key-value store. The purpose of the API is to store any arbitrary length value in a persistent store with respect to a key and later fetch these values by keys. These values will have a TTL (for example 5 minutes) and after the TTL is over, the values will be removed from the store.

### ```GET /values```
Get all the values of the store.

response: ```{key1: value1, key2: value2, key3: value3...}```

### ```GET /values?keys=key1,key2```
Get one or more specific values from the store and also reset the TTL of those keys.

response: ```{key1: value1, key2: value2}```

### ```POST /values```
Save a value in the store.

request: ```{key1: value1, key2: value2..}```
response: whatever’s appropriate

### ```PATCH /values```
Update a value in the store and also reset the TTL.

request: ```{key1: value1, key2: value2..}```
response: whatever’s appropriate

## Constraints
- ### Must be done
- Use appropriate status codes with all the responses.
- Values can be of arbitrary length
- Remove all values stored over more than 5 minutes. Set a TTL.
- Has to be FAST
- ### Good to have
- Reset TTL on every GET Request.
- Must be fault-tolerant, persistent
- It's a plus if you can run the service with single command
- writing test case is also encourged if possible