Correct location of Docerfile for using devcontainer

Author: tomtrafford

.devcontainer/devcontainer.json

@@ -2,7 +2,7 @@
 {
     "name": "Python 3 Developer Container",
     "build": {
-        "dockerfile": "../Dockerfile",
+        "dockerfile": "./Dockerfile",
         "target": "build",
         // Only upgrade pip, we will install the project below
         "args": {
@@ -51,4 +51,4 @@
     "workspaceFolder": "${localWorkspaceFolder}",
     // After the container is created, install the python project in editable form
     "postCreateCommand": "pip install -e '.[dev]'"
-}
+}