Adding deployment file

Dockerfile

@@ -0,0 +1,23 @@
+# specify the base image to  be used for the application
+FROM golang:1.21.4-alpine
+
+# create the working directory in the image
+WORKDIR /app
+
+# copy Go modules and dependencies to image
+COPY go.mod ./
+
+# download Go modules and dependencies
+RUN go mod download
+
+# copy all the Go files ending with .go extension
+COPY *.go ./
+
+# compile application
+RUN go build -o /golang-http-header
+
+# network port at runtime
+EXPOSE 8000
+
+# execute when the container starts
+CMD [ "/golang-http-header" ]

deployment.yaml

@@ -0,0 +1,34 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: http-header
+  labels:
+    app: golang
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: golang
+  template:
+    metadata:
+      labels:
+        app: golang
+    spec:
+      containers:
+      - name: http-header
+        image: git.10bit.link/kcrawford/golang-http-header:0.0.4
+        ports:
+          - containerPort: 8000
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: go-frontend
+spec:
+  selector:
+    app: golang
+  ports:
+    - protocol: TCP
+      port: 80
+      targetPort: 8000

go.mod

@@ -0,0 +1,3 @@
+module golang-http-header
+
+go 1.21.4

main.go

@@ -18,16 +18,16 @@ func handler(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Server-Hostname", hostname)
 
 	// Send a response
-	fmt.Fprintf(w, "Hello! This is server: %s\n", hostname)
+	fmt.Fprintf(w, "This is server: %s\n", hostname)
 }
 
 func main() {
 	// Define the handler function for incoming requests
 	http.HandleFunc("/", handler)
 
-	// Start the HTTP server on port 8080
-	fmt.Println("Server listening on :8080...")
-	err := http.ListenAndServe(":8080", nil)
+	// Start the HTTP server on port 8000
+	fmt.Println("Server listening on :8000...")
+	err := http.ListenAndServe(":8000", nil)
 	if err != nil {
 		fmt.Println("Error:", err)
 	}