Snapshots create and apply draft

# Create snapshorts

## Create sharder snapshots
Use sharder1 on mainnet as an example, we need to stop both the sharder and postgres docker containers first. Then find all the data folders, compress them and upload to the snapshots server.

get data in `/var/0chain/sharder/ssd` folder and compress:
```sh
tar -czvf sharder-ssd.tar.gz /var/0chain/sharder/ssd/docker.local/data

# upload the ssharder-ssd.tar.gz to snapshots server
```

get data in `/var/0chain/sharder/hdd` folder and compress:
```sh
tar -czvf sharder-hdd.tar.gz /var/0chain/sharder/hdd/docker.local/sharder1/data

# upload the sharder-hdd.tar.gz to snapshots server
```

# Create miner snapshot

Stop the miner docker container, then compress the data folder:

```sh
tar -czvf miner-ssd.tar.gz /var/0chain/miner/ssd/docker.local/miner1/data

# upload the miner-ssd.tar.gz to snapshots server
```

# Apply snapshots
## Sharder

The first step is ensure both sharder and postgres are not running, stop them otherwise.

Download the snapshots from the snapshots server, get both `sharder-ssd.tar.gz` and `sharder-hdd.tar.gz` . Suppose the sharder has the same folder structure, before applying the snapshots, please backup the existing data if any.

Extract the ssd sharder data

```sh
tar -xzvf sharder-ssd.tar.gz -C /var/0chain/sharder/ssd/docker.local/sharder1/data/
```

Extract the hdd sharder data

```sh
tar -xzvf sharder-hdd.tar.gz -C /var/0chain/sharder/hdd/docker.local/sharder1/data/
```

Once extracted, we can start the sharder and postgres docker containers.

### Miner
Stop the miner and redis if they are running. There are 2 redis instances, `miner*_redis_1` and `miner*_redis_txns_1`. So make sure they are both stopped.

Download the snapshot from server.
Backup the data if any.

Extract the snapshot to the miner's data folder, for our miner server, we can do:
```sh
tar -xzvf miner-ssd.tar.gz -C /var/0chain/miner/ssd/docker.local/miner1/data/
```

Start the miner and redis containers

A issue descreve a criação e aplicação de snapshots para nós sharder e miner. Comece examinando a estrutura do repositório para localizar scripts existentes no projeto zcnwebappscripts. Procure por quaisquer scripts relacionados na base de código que lidem com comandos docker ou backup de dados. Verifique os caminhos de pasta mencionados (/var/0chain/sharder/ssd, etc.) em relação à documentação ou arquivos de configuração do projeto. A tarefa é documentar essas etapas, portanto, certifique-se de que a documentação final seja colocada em um local apropriado, como um README ou uma pasta docs.

Escrita pelo modelo de indexação a partir do texto da issue.