chore: add devcontainer configuration (#312)

Author: nozaq

.devcontainer/Dockerfile

@@ -0,0 +1,5 @@
+FROM mcr.microsoft.com/devcontainers/base:bullseye
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends python3-pip \
+    && pip install --no-input pre-commit

.devcontainer/devcontainer.json

@@ -0,0 +1,21 @@
+{
+	"name": "Terraform",
+	"build": {
+		"dockerfile": "./Dockerfile",
+		"context": "."
+	},
+	"features": {
+		"ghcr.io/devcontainers/features/terraform:1": {
+			"version": "latest",
+			"installTerraformDocs": true
+		}
+	},
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"EditorConfig.EditorConfig"
+			]
+		}
+	},
+	"postCreateCommand": "pre-commit install"
+}