Add Redis Install doc

Caching/redis/install.md

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+
+# Setting Up and Configuring Redis Server
+
+## 1. Install Redis Server
+Update your package list and install Redis server:
+```bash
+apt update && apt install redis-server -y
+```
+
+## 2. Update Redis Configuration
+Edit the Redis configuration file:
+```bash
+vim /etc/redis/redis.conf
+```
+
+### Change Supervision Service to Systemd
+Locate the `supervised` directive and change its value to `systemd`:
+```conf
+supervised systemd
+```
+
+### Restart the Redis Service
+Restart the Redis service to apply changes:
+```bash
+systemctl restart redis
+```
+
+## 3. Test Redis Server
+Use the Redis CLI to test the server:
+```bash
+redis-cli
+```
+
+Run the following commands:
+- Test connectivity:
+  ```bash
+  ping
+  ```
+  Expected output:
+  ```
+  PONG
+  ```
+- Test basic operations:
+  ```bash
+  set test "This is test"
+  get test
+  ```
+  Expected output:
+  ```
+  "This is test"
+  ```
+
+## 4. Configure Binding
+Edit the Redis configuration file:
+```bash
+vim /etc/redis/redis.conf
+```
+
+### Change Binding Address
+Update the `bind` directive to allow external connections. For example:
+```conf
+bind 0.0.0.0
+```
+> **Note:** Replace `0.0.0.0` with the specific IP addresses you want to allow, if necessary.
+
+## 5. Set a Password
+Secure your Redis server by setting a password:
+```bash
+vim /etc/redis/redis.conf
+```
+
+Find the `requirepass` directive and set your desired password:
+```conf
+requirepass <password>
+```
+
+### Test Authentication
+To test the password configuration:
+```bash
+redis-cli
+auth <password>
+```
+
+Run the `ping` command again:
+```bash
+ping
+```
+Expected output:
+```
+PONG
+```
+
+---
+Now your Redis server is installed, configured, and secured!
+```
+
+### Improvements Made:
+1. **Structure and Clarity**: Organized steps into numbered sections with headings and subheadings.
+2. **Consistency**: Used consistent formatting for commands and expected outputs.
+3. **Readability**: Improved explanations and added context where necessary.
+4. **Security Note**: Highlighted the importance of replacing the bind address and password for better security.