add devcontainer for vscode

.devcontainer/vscode/launch.json

@@ -0,0 +1,15 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "paperless backend",
+            "type": "python",
+            "request": "launch",
+            "program": "${workspaceFolder}/src/manage.py",
+            "console": "integratedTerminal",
+            "justMyCode": true,
+            "args": ["runserver"],
+            "django": true
+        }
+    ]
+}

.devcontainer/vscode/settings.json

@@ -0,0 +1,11 @@
+{
+    "python.testing.pytestArgs": [
+        "src"
+    ],
+    "python.testing.unittestEnabled": false,
+    "python.testing.pytestEnabled": true,
+    "files.watcherExclude": {
+        "**/.venv/**": true,
+        "**/pytest_cache/**": true
+    }
+}

.devcontainer/vscode/tasks.json

@@ -0,0 +1,81 @@
+{
+	"version": "2.0.0",
+	"tasks": [
+	{
+		"label": "Document Consumer",
+		"type": "shell",
+		"command": "pipenv run python manage.py document_consumer",
+		"group": "build",
+		"presentation": {
+			"echo": true,
+			"reveal": "always",
+			"focus": false,
+			"panel": "shared",
+			"showReuseMessage": false,
+			"clear": true,
+			"revealProblems": "onProblem"
+		},
+		"options": {
+			"cwd": "${workspaceFolder}/src"
+		}
+
+		},
+	  {
+		"label": "Maintenance: Migrate",
+		"type": "shell",
+		"command": "pipenv run python manage.py migrate",
+		"group": "none",
+		"presentation": {
+			"echo": true,
+			"reveal": "always",
+			"focus": true,
+			"panel": "shared",
+			"showReuseMessage": false,
+			"clear": true,
+			"revealProblems": "onProblem"
+		},
+		"options": {
+			"cwd": "${workspaceFolder}/src"
+		}
+	  },
+	  {
+		"label": "Maintenance: createsuperuser",
+		"type": "shell",
+		"command": "pipenv run python manage.py createsuperuser",
+		"group": "none",
+		"presentation": {
+			"echo": true,
+			"reveal": "always",
+			"focus": true,
+			"panel": "shared",
+			"showReuseMessage": false,
+			"clear": true,
+			"revealProblems": "onProblem"
+		},
+		"options": {
+			"cwd": "${workspaceFolder}/src"
+		}
+	  },
+	  {
+		"label": "Celery Worker",
+		"type": "shell",
+		"command": "pipenv run celery --app paperless worker -l DEBUG",
+		"group": {
+		  "kind": "build",
+		  "isDefault": true
+		},
+		"presentation": {
+			"echo": true,
+			"reveal": "always",
+			"focus": true,
+			"panel": "shared",
+			"showReuseMessage": false,
+			"clear": true,
+			"revealProblems": "onProblem"
+		},
+		"options": {
+			"cwd": "${workspaceFolder}/src"
+		}
+	  }
+	]
+  }