Add initial project structure with database connection and routing setup

- Create .env.example and .gitignore to manage environment variables
- Implement database connection logic in bd.go
- Define project model and data retrieval functions in projet.go
- Set up HTTP routes for project management in routes/projet.go
- Add main entry point in main.go to start the server

routes/projet.go

@@ -0,0 +1,62 @@
+package routes
+
+import (
+	"api_serveurless_go/requette"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+// SetupRoutes configure toutes les routes de l'application
+func SetupRoutes() {
+	http.HandleFunc("/", homeHandler)
+	http.HandleFunc("/api/projets", projetsHandler)
+	http.HandleFunc("/api/projet/", projetHandler)
+}
+
+// homeHandler gère la route racine
+func homeHandler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Welcome to my website!")
+}
+
+// projetsHandler gère la liste des projets
+func projetsHandler(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case "GET":
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		json.NewEncoder(w).Encode(requette.GetAllProjets())
+	case "POST":
+		fmt.Fprintf(w, "Créer un nouveau projet")
+	default:
+		http.Error(w, "Méthode non autorisée", http.StatusMethodNotAllowed)
+	}
+}
+
+// projetHandler gère les actions sur un projet spécifique
+func projetHandler(w http.ResponseWriter, r *http.Request) {
+	id := strings.TrimPrefix(r.URL.Path, "/api/projet/")
+	if id == "" {
+		http.Error(w, "ID manquant", http.StatusBadRequest)
+		return
+	}
+	idInt, err := strconv.Atoi(id)
+	if err != nil {
+		http.Error(w, "ID invalide", http.StatusBadRequest)
+		return
+	}
+	switch r.Method {
+	case "GET":
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		json.NewEncoder(w).Encode(requette.GetProjetByID(idInt))
+	case "PUT":
+		fmt.Fprintf(w, "Modifier le projet %d", idInt)
+	case "DELETE":
+		fmt.Fprintf(w, "Supprimer le projet %d", idInt)
+	default:
+		http.Error(w, "Méthode non autorisée", http.StatusMethodNotAllowed)
+	}
+}