third pass of ci

.github/workflows/build.yaml

@@ -23,13 +23,13 @@ jobs:
         include:
           - dockerfile: Dockerfile
             image: mywebsite-public
-            context: .
+            context: ./backend/public
           - dockerfile: Dockerfile
             image: mywebsite-task
-            context: .
+            context: ./backend/task
           - dockerfile: Dockerfile
             image: mywebsite-frontend
-            context: .
+            context: ./frontend
 
     steps:
       - name: Checkout repository