Simplify Dockerfile and devcontainer

Author: nojaf

.devcontainer/Dockerfile

@@ -0,0 +1,10 @@
+FROM mcr.microsoft.com/devcontainers/rust:1-1-bookworm
+LABEL org.opencontainers.image.authors="Christoph Knittel <ck@cca.io>"
+LABEL org.opencontainers.image.description="Docker image for ReScript development."
+
+RUN apt update && apt install -y --no-install-recommends opam musl-tools python-is-python3
+
+# OCaml
+# RUN opam init -y --bare --disable-sandboxing git+https://github.com/rescript-lang/opam-repository
+# RUN opam switch create 5.2.0 --packages ocaml-option-static
+# RUN opam install -y dune cppo=1.6.9 js_of_ocaml-compiler=5.8.1 ocamlformat=0.26.2 ounit2=2.2.7 reanalyze=2.25.1

.devcontainer/devcontainer.json

@@ -1,23 +1,25 @@
 {
   "name": "ReScript Compiler",
   "build": {
-    "context": "..",
-    "dockerfile": "../docker/Dockerfile"
+    "context": ".",
+    "dockerfile": "Dockerfile"
   },
   "features": {
-    "ghcr.io/devcontainers/features/github-cli:1":{}
+    "ghcr.io/devcontainers/features/github-cli:1":{
+      "installDirectlyFromGitHubRelease": true,
+      "version": "latest"
+    },
+    "ghcr.io/devcontainers/features/node:1": {
+      "version":"20"
+    }
   },
   "customizations": {
     "vscode": {
       "extensions": [
         "chenglou92.rescript-vscode",
         "biomejs.biome"
-      ],
-      "settings": {
-        "terminal.integrated.defaultProfile.linux": "bash"
-      }
+      ]
     }
   },
-  "postCreateCommand": ".devcontainer/postCreate.sh",
-  "remoteUser": "devuser"
+  "postCreateCommand": ".devcontainer/postCreate.sh"
 }

.devcontainer/postCreate.sh

@@ -1,4 +1,9 @@
-#!/bin/bash
+#!/bin/sh
+
+# Opam stuff post install
+opam init -y --bare --disable-sandboxing git+https://github.com/rescript-lang/opam-repository
+opam switch create 5.2.0 --packages ocaml-option-static
+opam install -y dune cppo=1.6.9 js_of_ocaml-compiler=5.8.1 ocamlformat=0.26.2 ounit2=2.2.7 reanalyze=2.25.1
 
 # Install dev dependencies from OPAM
 opam install . --deps-only -y
@@ -7,6 +12,6 @@ opam install . --deps-only -y
 opam install ocaml-lsp-server -y
 
 # Add OPAM environment setup to shell startup script
-echo 'eval $(opam env)' >> ~/.bashrc
+echo 'eval $(opam env)' >> ~/.zshrc
 
 npm install --ignore-scripts