Added devcontainer (#94)

* Added devcontainer

* Updated readme

Author: TBThomas56

.devcontainer/Dockerfile

@@ -0,0 +1 @@
+FROM node:24.7-bookworm

.devcontainer/devcontainer.json

@@ -0,0 +1,25 @@
+{
+  "name": "sci-react-ui-devcontainer",
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2.4.2": {
+      "username": "none",
+      "upgradePackages": false
+    },
+    "ghcr.io/devcontainers-extra/features/pnpm:2": {}
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "tamasfe.even-better-toml",
+        "esbenp.prettier-vscode",
+        "dbaeumer.vscode-eslint"
+      ]
+    }
+  },
+  "runArgs": ["--security-opt=label=type:container_runtime_t"],
+  "workspaceMount": "source=.,target=/workspace,type=bind",
+  "workspaceFolder": "/workspace"
+}

.gitignore

@@ -8,5 +8,6 @@
 /diamondlightsource-sci-react-ui-*.tgz
 /storybook-static/
 /docs
+.pnpm-store/
 
 tsconfig.tsbuildinfo

readme.md

@@ -154,7 +154,8 @@ Developing
 
 Code can be found at [github.com/DiamondLightSource/sci-react-ui](https://github.com/DiamondLightSource/sci-react-ui).
 
-You'll need `pnpm` installed to build it. See [tools.md](./tools.md) for list of other tools used in this library
+You'll need `pnpm` installed to build it. (note: it is automatically installed as a feature if you are using devcontainers)
+See [tools.md](./tools.md) for list of other tools used in this library
 
 ### Build
 
@@ -170,7 +171,7 @@ Build with rollup
 pnpm run rollup
 ```
 
-### Storybook 
+### Storybook
 
 To view the components in Storybook use:
 
@@ -223,7 +224,7 @@ Steps needed when publishing a new version.
 ### GitHub release
 - GitHub releases and create a new draft release https://github.com/DiamondLightSource/sci-react-ui/releases
   - Select the new tag in the "Choose a tag" drop down.
-  - Copy in the npm url "See https://www.npmjs.com/package/@diamondlightsource/sci-react-ui" 
+  - Copy in the npm url "See https://www.npmjs.com/package/@diamondlightsource/sci-react-ui"
   - Copy in the top section of the changelog.
   - Press "Publish Release"
 - It is now published!
@@ -237,10 +238,10 @@ and create a new section in  [./changelog.md](changelog.md) so subsequent change
 ---------------------
 
 ### Added
-- 
+-
 
 ### Fixed
-- 
+-
 
 ### Changed
 -