Improve Deno project (#111)

* docs(deno): improve README

* feat(deno): stricter compiler options

* fix: allow unchecked indexed access

This can easily throw errors that may
not be valuable in the context of a code
pairing test for our candidates

---------

Co-authored-by: Mario Savarese <[email protected]>

Author: mxdvl

typescript-deno/README.md

@@ -9,21 +9,16 @@ If using VSCode, you might want to enable the extension in the settings:
 ```jsonc
 // .vscode/settings.json
 {
-  "deno.enable": true
+  "deno.enable": true,
+  // or specifically
+  "deno.enablePaths": ["./typescript-deno"]
 }
 ```
 
 ## Usage
 
-- `./script/start` to run your code
-- `./script/start` to run the tests
-
-### Other commands
-
-- `deno run src/exerciste.ts --watch` will re-run [`mod.ts`](./src/mod.ts) on every
-  file change, for quick development feedback.
-- `deno test src --watch` will re-run [`mod.test.ts`](./src/mod.test.ts) on every file
-  change, for quick development feedback.
+- `./script/start` to run the source code
+- `./script/test` to run the tests in watch mode
 
 ## Structure
 

typescript-deno/deno.jsonc

@@ -0,0 +1,13 @@
+{
+  "tasks": {
+    "start": "./script/start",
+    "test": "./script/test"
+  },
+  // https://github.com/guardian/csnx/blob/1be3fd98ed527ccf0f1b8e21f10039e23fdb3fb7/libs/%40guardian/tsconfig/tsconfig.json
+  "compilerOptions": {
+    "noImplicitReturns": true,
+    "noUncheckedIndexedAccess": false, // disabled to prevent errors in C-style loops: https://github.com/guardian/coding-exercise-project/pull/111#discussion_r1481440786
+    "noUnusedLocals": true,
+    "strict": true
+  }
+}

typescript-deno/deno.lock

@@ -2,4 +2,4 @@
 
 set -e
 
-deno test src
+deno test src --watch