consume variables to set username and password otherwise use defaults (#90)

docker-compose.yaml

@@ -1,4 +1,4 @@
-version: '3'
+version: "3"
 
 services:
   wg:
@@ -10,6 +10,9 @@ services:
       - EMAIL_FROM
       - EMAIL_FROM_NAME
       - SESSION_SECRET
+      - WGUI_USERNAME=alpha
+      - WGUI_PASSWORD=this-unusual-password
+
     ports:
       - 5000:5000
     logging:

util/db.go

@@ -15,6 +15,8 @@ import (
 )
 
 const dbPath = "./db"
+const username_env_var = "WGUI_USERNAME"
+const password_env_var = "WGUI_PASSWORD"
 const defaultUsername = "admin"
 const defaultPassword = "admin"
 const defaultServerAddress = "10.252.1.0/24"
@@ -33,6 +35,13 @@ func DBConn() (*scribble.Driver, error) {
 	return db, nil
 }
 
+func getCredVar(key, fallback string) string {
+    if value, ok := os.LookupEnv(key); ok {
+		return value
+    }
+    return fallback
+}
+
 // InitDB to create the default database
 func InitDB() error {
 	var clientPath string = path.Join(dbPath, "clients")
@@ -112,8 +121,8 @@ func InitDB() error {
 		}
 
 		user := new(model.User)
-		user.Username = defaultUsername
+		user.Username = getCredVar(username_env_var, defaultUsername)
-		user.Password = defaultPassword
+		user.Password = getCredVar(password_env_var, defaultPassword)
 		db.Write("server", "users", user)
 	}