chore: add a devcontainer file

.devcontainer/devcontainer.json

@@ -0,0 +1,21 @@
+{
+	"name": "tediousjs/tedious",
+	"dockerComposeFile": "docker-compose.yml",
+	"service": "app",
+	"workspaceFolder": "/workspace",
+
+	"settings": {
+		"terminal.integrated.shell.linux": "/bin/bash"
+	},
+
+	"extensions": [
+		"ms-mssql.mssql",
+		"dbaeumer.vscode-eslint"
+	],
+
+	"postCreateCommand": "npm install",
+
+	"containerEnv": {
+		"EDITOR": "code --wait"
+	}
+}

.devcontainer/docker-compose.yml

@@ -0,0 +1,24 @@
+version: '3'
+
+services:
+  app:
+    image: "mcr.microsoft.com/vscode/devcontainers/javascript-node:14"
+
+    volumes:
+      - "..:/workspace:cached"
+      - "./test-connection.json:/root/.tedious/test-connection.json"
+
+    # Overrides default command so things don't shut down after the process ends.
+    command: "sleep infinity"
+
+    depends_on:
+      - mssql
+
+  mssql:
+    image: "mcr.microsoft.com/mssql/server:2019-latest"
+
+    restart: unless-stopped
+
+    environment:
+      - "ACCEPT_EULA=Y"
+      - "SA_PASSWORD=yourStrong(!)Password"

.devcontainer/test-connection.json

@@ -0,0 +1,17 @@
+{
+  "config": {
+    "server": "mssql",
+    "authentication": {
+      "type": "default",
+      "options": {
+        "userName": "sa",
+        "password": "yourStrong(!)Password"
+      }
+    },
+    "options": {
+      "port": 1433,
+      "database": "master",
+      "trustServerCertificate": true
+    }
+  }
+}