added frontend and updated backend with docker, wrote some initial instructions

backend/service/events/courseService.go

@@ -0,0 +1,12 @@
+package events
+
+import (
+	"github.com/labstack/echo/v5"
+	"github.com/pocketbase/pocketbase"
+	"htwk-planner/service/db"
+)
+
+func GetAllCourses(app *pocketbase.PocketBase, c echo.Context) error {
+	courses := db.GetAllCourses(app)
+	return c.JSON(200, courses)
+}