refactor: Remove version field from compose.yaml

fix: Correct formatting of ConfigMap example in Kubernetes introduction

feat: Update startupProbe and readinessProbe in Kubernetes introduction

feat: Update startupProbe failure threshold in Kubernetes introduction

feat: Add probes and update pod lifecycle in Kubernetes introduction

feat: Add string operations examples in Golang concepts

docs/golang/concepts/0) test.go

@@ -3,5 +3,12 @@ package main
 import "fmt"
 
 func main() {
-	fmt.Println("Hello World!")
-}
+	var num int = 42
+	var numFloat float64 = float64(num)
+
+	var numFloat2 = 3.14
+	var numInt = int(numFloat2)
+
+	fmt.Println(numFloat)
+	fmt.Println(numInt)
+}

docs/golang/concepts/17) switch-statements.go

@@ -2,13 +2,14 @@ package main
 
 func main() {
 
-	city := "london"
+	city := "paris"
 
 	switch city {
 	case "london", "manchester": // Here we are checking for multiple values with the same output
 		println("London or Manchester")
 	case "paris":
 		println("Paris ")
+		fallthrough
 	case "rome":
 		println("Rome ")
 	default: // This is the default case

docs/golang/concepts/6) string-opr.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+func main() {
+
+	var name = "John"
+	fmt.Println(len(name))               // It will print the length of the string
+	fmt.Println(strings.ToUpper(name))   // It will print the string in uppercase
+	fmt.Println(strings.ToLower(name))   // It will print the string in lowercase
+	fmt.Println(strings.Title(name))     // It will print the string in title case
+	fmt.Println(strings.Repeat(name, 3)) // It will repeat the string 3 times
+	fmt.Println(strings.Replace(name, "J", "K", 1)) // It will replace the first occurrence of J with K
+	fmt.Println(strings.Split(name, "")) // It will split the string into a slice of characters
+}