Add deploy script

scripts/deploy.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+SERVICE="blog-front"
+BLUE_SERVICE="$SERVICE-blue"
+GREEN_SERVICE="$SERVICE-green"
+CONFIG_FILE='/etc/nginx/sites-available/marshall-ku.com'
+
+cd ~/dev/marshallku-blog-frontend || exit 1
+git pull origin master
+
+ACTIVE_SERVICE=''
+INACTIVE_SERVICE=''
+
+if docker ps --format "{{.Names}}" | grep -q "$BLUE_SERVICE"; then
+    echo "Switching to green"
+    ACTIVE_SERVICE="$GREEN_SERVICE"
+    INACTIVE_SERVICE="$BLUE_SERVICE"
+else
+    echo "Switching to blue"
+    ACTIVE_SERVICE="$BLUE_SERVICE"
+    INACTIVE_SERVICE="$GREEN_SERVICE"
+fi
+
+ACTIVE_PORT=$([ "$ACTIVE_SERVICE" == "$BLUE_SERVICE" ] && echo '4200' || echo '4201')
+INACTIVE_PORT=$([ "$ACTIVE_SERVICE" == "$BLUE_SERVICE" ] && echo '4201' || echo '4200')
+
+# Build container
+docker compose up --build -d $ACTIVE_SERVICE
+
+# Health check
+sleep 10
+
+SERVER_URL="http://0.0.0.0:$ACTIVE_PORT"
+response=$(curl -s -o /dev/null -I -w "%{http_code}" "$SERVER_URL")
+
+if [[ $response -eq 200 ]]; then
+    # Shift traffic
+    echo "$SERVER_URL responsed with status 200, deploying $ACTIVE_SERVICE"
+    sudo /bin/sed -i "s/:$INACTIVE_PORT/:$ACTIVE_PORT/g" "$CONFIG_FILE"
+    # Should prevent sigkill
+    sudo /bin/systemctl restart nginx || exit 1
+
+    docker compose down $INACTIVE_SERVICE
+else
+    # Rollback
+    echo "$ACTIVE_SERVICE is DOWN, terminating..."
+    docker compose down $ACTIVE_SERVICE
+    exit 1
+fi