Konténerizált API

Dockerfile

@@ -0,0 +1,9 @@
+FROM golang:1.23-alpine
+
+WORKDIR /app
+COPY . .
+
+RUN go build -o go-api main.go
+
+EXPOSE 8080
+CMD ["./go-api"]

docker-compose.yml

@@ -0,0 +1,8 @@
+version: '3.8'
+
+services:
+  go-api:
+    build: .
+    container_name: go-api
+    ports:
+      - "8080:8080"

main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
+
+type HealthResponse struct {
+	Status string `json:"status"`
+}
+
+type AddRequest struct {
+	PinCode int `json:"pinCode"`
+	N1      int `json:"n1"`
+	N2      int `json:"n2"`
+}
+
+type AddResponse struct {
+	Output int `json:"output"`
+}
+
+func healthHandler(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(HealthResponse{Status: "ok"})
+}
+
+func addHandler(w http.ResponseWriter, r *http.Request) {
+	var req AddRequest
+	err := json.NewDecoder(r.Body).Decode(&req)
+	if err != nil {
+		http.Error(w, "invalid json", http.StatusBadRequest)
+		return
+	}
+
+	if req.PinCode != 1234 {
+		http.Error(w, "unauthorized", http.StatusUnauthorized)
+		return
+	}
+
+	result := req.N1 + req.N2
+	resp := AddResponse{Output: result}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(resp)
+}
+
+func main() {
+	http.HandleFunc("/health", healthHandler)
+	http.HandleFunc("/add", addHandler)
+
+	fmt.Println("Server running on port 8080...")
+	http.ListenAndServe(":8080", nil)
+}