Add .devcontainer files

Author: andreiltd

.devcontainer/Dockerfile

@@ -0,0 +1,20 @@
+ARG VARIANT="22"
+FROM mcr.microsoft.com/devcontainers/javascript-node:1-${VARIANT}
+
+# Install system dependencies
+RUN apt-get update \
+  && export DEBIAN_FRONTEND=noninteractive \
+  && apt-get -y install --no-install-recommends curl gnupg2 tar xz-utils build-essential \
+  && rm -rf /var/lib/apt/lists/*
+
+# Switch to node user to install wasmtime
+USER node
+
+# Install Wasmtime
+RUN curl https://wasmtime.dev/install.sh -sSf | bash
+
+# Install just
+RUN npm install -g rust-just
+
+# Set up workspace
+WORKDIR /workspace

.devcontainer/devcontainer.json

@@ -0,0 +1,13 @@
+{
+  "name": "wasi-http-js",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": ".."
+  },
+  "settings": {
+  },
+  "extensions": [
+  ],
+  "forwardPorts": [8080],
+  "remoteUser": "node"
+}