Remove comments from devcontainer JSON (#138)

Comments aren't allowed in the JSON.

Author: frankieroberto

.devcontainer/devcontianer.json

@@ -1,50 +1,23 @@
 {
   "name": "Record a vaccination prototype",
   "image": "mcr.microsoft.com/devcontainers/universal:2",
-  // codespaces seems to have an issue using port 2000 so setting to 2001 for the NHS Prototype Kit
   "runArgs": ["--env", "PORT=2001"],
   "portsAttributes": {
     "3001": {
       "label": "Running prototype",
-      // --------------------------------
-      // onAutoForward possible options
-      // --------------------------------
-      // you can change the value to one of the following possible options:
-      // 'notify' (shows a prompt),
-      // 'silent' (does nothing)
-      // 'openBrowser' (opens the prototype URL in a browser window/tab)
-      // 'openPrview' (opens the codespaces preview window to present the running prototype to the user)
       "onAutoForward": "openPreview"
     }
   },
-  // forward the port for the browersync process
   "forwardPorts": [3001],
   "otherPortsAttributes": { "onAutoForward": "ignore" },
-  // when created - sets the git merge statergy to rebase to hopefully make easier time of merging
   "onCreateCommand": "git config --global pull.rebase true",
-  // after creation - installs the node packages
   "postCreateCommand": "npm install",
-  // A command to run each time a tool has successfully attached to the container
   "postAttachCommand": {
     "server": "npm run watch"
   },
-  // codespace customisations
   "customizations": {
-    // Configure properties specific to VS Code web-basde IDE used within codespaces.
     "vscode": {
-      // editor settings
       "settings": {
-        // uncomment the following lines to hide files not needed to update content
-        // "files.exclude": {
-        //   "{docs,lib,linters,middleware,node_modules,public,tests,NHS111.Shared.Frontend}/": true,
-        //   "*{CHANGELOG,CONTRIBUTING}.md": true,
-        //   "app/{data,assets}/": true,
-        //   "app/*.js": true,
-        //   "*.{js,yml,json}": true,
-        //   ".*": true,
-        //   "LICENSE": true
-        // },
-        // make emmet work within nunjucks
         "emmet.includeLanguages": {
           "njk": "html",
           "nunjucks": "html",
@@ -55,9 +28,7 @@
         },
         "html.suggest.html5": true
       },
-      // bundle the following editor extensions
       "extensions": [
-        // nunjuck syntax highlighting
         "douglaszaltron.nunjucks-vscode-extensionpack"
       ]
     }