Add create post endpoint and check target to the makefile

server/app/permissions.go

@@ -0,0 +1,6 @@
+package app
+
+// ToDo: implement
+func (a *App) HasPermissionToGame(userID, gameID int) bool {
+	return true
+}

server/app/post.go

@@ -0,0 +1,15 @@
+package app
+
+import (
+	"fmt"
+
+	"git.ctrlz.es/mgdelacroix/craban/model"
+)
+
+func (a *App) CreatePost(post *model.Post) (*model.Post, error) {
+	if err := post.IsValid(); err != nil {
+		return nil, fmt.Errorf("invalid post for creation: %w", err)
+	}
+
+	return a.Store.Post().Create(post)
+}