Add dev container

.devcontainer/Dockerfile

@@ -0,0 +1,4 @@
+FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:16
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get install ffmpeg gnupg2 -y
+ENV NODE_ENV=development

.devcontainer/devcontainer.json

@@ -0,0 +1,12 @@
+{
+    "build": { "dockerfile": "Dockerfile" },
+    "mounts": [
+        "source=abs-node-node_modules,target=${containerWorkspaceFolder}/node_modules,type=volume"
+    ],
+    "features": {
+        "fish": "latest"
+	},
+	"extensions": [
+		"eamodio.gitlens"
+	]
+}