ci: add GitHub Actions automated deployment workflow and CI/CD guide

.github/workflows/deploy.yml

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+name: Deploy RIT Freshers Hub to VPS
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    name: Deploy to Live VPS
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+
+      - name: SSH into VPS and Deploy
+        uses: appleboy/ssh-action@v1.0.3
+        with:
+          host: ${{ secrets.VPS_HOST }}
+          username: ${{ secrets.VPS_USERNAME }}
+          key: ${{ secrets.VPS_SSH_KEY }}
+          port: 22
+          script: |
+            echo "🚀 Starting Automated CI/CD Deployment..."
+            cd /var/www/freshers-hub
+            
+            echo "📥 Pulling latest code from GitHub..."
+            git pull origin main
+            
+            echo "⚡ Building Frontend PWA..."
+            npm install --production=false
+            npm run build
+            
+            echo "🤖 Building Go Chatbot..."
+            cd /var/www/freshers-hub/chatbot-service
+            go build -o chatbot-service main.go
+            
+            echo "🔄 Restarting Systemd Services..."
+            systemctl restart springboot chatbot telegram-bot nginx
+            
+            echo "🎉 Deployment Completed Successfully!"

CICD_GUIDE.md

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+# 🔄 RIT Freshers Hub - Step-by-Step CI/CD Pipeline Guide
+
+Automate your live server deployments with **GitHub Actions** so that whenever you run `git push origin main`, your website, backend, chatbot, and services update on your VPS automatically in 30 seconds!
+
+---
+
+## 🏗️ How the CI/CD Pipeline Works
+
+```mermaid
+graph LR
+    A[💻 Developer Pushes Code] -->|git push origin main| B[🐙 GitHub Repository]
+    B -->|Triggers Workflow| C[⚡ GitHub Actions Runner]
+    C -->|Secure SSH Connection| D[🌐 VPS Server 129.121.126.66]
+    D -->|1. git pull| E[📥 Update Code]
+    E -->|2. npm run build| F[⚡ Build PWA Frontend]
+    F -->|3. go build| G[🤖 Build Go Engine]
+    G -->|4. systemctl restart| H[🚀 Live Site Updated!]
+```
+
+---
+
+## 🛠️ Step-by-Step Setup Guide
+
+### Step 1: Add SSH Secrets to your GitHub Repository
+
+1. Open your GitHub Repository in your web browser:
+   `https://github.com/Amudieshwar-AG/Freshers-Hub`
+2. Click **Settings** (top toolbar) ⚙️.
+3. In the left sidebar, expand **Secrets and variables** ➔ click **Actions**.
+4. Click **New repository secret** (green button on top right) and add these **3 secrets**:
+
+---
+
+#### 🔑 Secret 1: `VPS_HOST`
+* **Name:** `VPS_HOST`
+* **Secret Value:** `129.121.126.66`
+
+#### 🔑 Secret 2: `VPS_USERNAME`
+* **Name:** `VPS_USERNAME`
+* **Secret Value:** `root`
+
+#### 🔑 Secret 3: `VPS_SSH_KEY`
+* **Name:** `VPS_SSH_KEY`
+* **Secret Value:** Paste your SSH Private Key contents.
+  * *Where to find your key on VPS:* Run `cat ~/.ssh/id_rsa` or `cat ~/.ssh/id_ed25519` on your server terminal.
+  * Copy the entire key including `-----BEGIN OPENSSH PRIVATE KEY-----` and `-----END OPENSSH PRIVATE KEY-----`.
+
+---
+
+### Step 2: Push the Workflow File to GitHub
+
+The deployment workflow file is already created at:
+[.github/workflows/deploy.yml](file:///f:/fresher/Freshers-Hub/.github/workflows/deploy.yml)
+
+Push it to GitHub by running in your local terminal:
+
+```bash
+git add .github/workflows/deploy.yml CICD_GUIDE.md
+git commit -m "ci: add GitHub Actions automated deployment workflow"
+git push origin main
+```
+
+---
+
+### Step 3: Test your CI/CD Pipeline! 🎉
+
+1. Make any code edit or change on your project.
+2. Push your changes:
+   ```bash
+   git push origin main
+   ```
+3. Go to your **GitHub Repository** ➔ Click the **Actions** tab.
+4. You will see a live workflow named **"Deploy RIT Freshers Hub to VPS"** running!
+5. In ~30 seconds, it will complete with a green checkmark `✓`, and your live server at `https://rit-services.in` will be updated automatically!
+
+---
+
+## 🛑 Troubleshooting CI/CD Pipeline Issues
+
+* **Error: `ssh: handshake failed` or `permission denied (publickey)`**
+  * **Fix:** Make sure the public key corresponding to `VPS_SSH_KEY` is added to `/root/.ssh/authorized_keys` on your VPS.
+  * On your VPS, run: `cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys`
+* **Error: `Host key verification failed`**
+  * **Fix:** `appleboy/ssh-action` handles host key verification automatically, but ensure `VPS_HOST` is set strictly to `129.121.126.66` without extra spaces or `http://`.