add(backend): config management

.gitignore

@@ -7,6 +7,7 @@
 
 # Test binary, built with `go test -c`
 *.test
+plakken
 
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out

config.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"os"
+	"strconv"
+)
+
+type config struct {
+	host          string
+	port          string
+	redisAddr     string
+	redisUser     string
+	redisPassword string
+	redisDB       int
+}
+
+func setConfig() config {
+	host := os.Getenv("PLAKKEN_HOST")
+
+	port := os.Getenv("PLAKKEN_PORT")
+	if port == "" {
+		port = "3000"
+	}
+	redisAddr := os.Getenv("PLAKKEN_REDIS_ADDR")
+	if redisAddr == "" {
+		redisAddr = "localhost:6379"
+	}
+
+	redisUser := os.Getenv("PLAKKEN_REDIS_USER")
+	redisPassword := os.Getenv("PLAKKEN_REDIS_PASSWORD")
+	redisDB, err := strconv.Atoi(os.Getenv("PLAKKEN_REDIS_DB"))
+	if err != nil {
+		redisDB = 0
+	}
+
+	s := config{
+		host:          host,
+		port:          port,
+		redisAddr:     redisAddr,
+		redisUser:     redisUser,
+		redisPassword: redisPassword,
+		redisDB:       redisDB,
+	}
+
+	return s
+}

main.go

@@ -6,14 +6,8 @@ import (
 )
 
 func main() {
-	i := 0
+	currentConfig := setConfig()
-	i = 5
+	listen := currentConfig.host + ":" + currentConfig.port
-
-	var k int8 = 0
-
-	fmt.Println(i)
-	fmt.Println(k)
-
 	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		_, err := fmt.Fprintf(w, "Hello, you're at %s", r.URL.Path)
 		if err != nil {
@@ -21,7 +15,7 @@ func main() {
 		}
 	})
 
-	err := http.ListenAndServe(":8080", nil)
+	err := http.ListenAndServe(listen, nil)
 	if err != nil {
 		return
 	}