Add devcontainer json

Author: nojaf

.devcontainer/devcontainer.json

@@ -0,0 +1,17 @@
+{
+  "name": "ReScript Compiler",
+  "build": {
+    "context": "..",
+    "dockerfile": "../docker/Dockerfile"
+  },
+  "features": {},
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "chenglou92.rescript-vscode",
+        "biomejs.biome"
+      ]
+    }
+  },
+  "postCreateCommand": ".devcontainer/postCreate.sh"
+}

.devcontainer/postCreate.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Install dev dependencies from OPAM
+opam install . --deps-only -y
+
+# For IDE support, install the OCaml language server
+opam install ocaml-lsp-server -y
+
+# Add OPAM environment setup to shell startup script
+echo 'eval $(opam env)' >> ~/.bashrc
+
+npm install --ignore-scripts