FEAT: Add devbox configuration files for project setup, and update contrib documentation

CONTRIBUTING.md

@@ -1,37 +1,58 @@
 # Contributions to the Kosli CLI
 
+## Prerequisites
+
+You need to have the followin environment variable:
+
+`export KOSLI_API_TOKEN_PROD=YourKeyHere`
+
+As well as access to the KOSLI AWS accounts.
+
+If you have not gotten that, and you are a KOSLI employee, please [read this](https://github.com/kosli-dev/knowledge-base/blob/master/aws_vault.md).
+
+## Tools setup
+
+You can compile and run the project via [DevBox from Jetlify](https://www.jetify.com/docs/devbox/installing_devbox/)
+
+After the installation, run `devbox shell` and all relevant tools will be avaliable to you.
+
 ## Running tests
 
 To run all tests, including the kubernetes tests, which take a few minutes:
-```
+
+```bash
 make test_integration_full
 ```
 
 To run tests and ignore tests that take longer to run:
-```
+
+```bash
 make test_integration
 ```
 
 To run a single test suite:
-```
+
+```bash
 make test_integration_single TARGET=<suiteName>
 ```
 
 Some tests will be skipped if the following environment variables are not set:
-```
+
+```bash
 KOSLI_GITHUB_TOKEN
 KOSLI_GITLAB_TOKEN
 KOSLI_BITBUCKET_ACCESS_TOKEN
 KOSLI_AZURE_TOKEN
 KOSLI_SONAR_API_TOKEN
 ```
 
-Additionally authentication is necessary to run some tests. See https://github.com/kosli-dev/knowledge-base.
+Additionally authentication is necessary to run some tests. See <https://github.com/kosli-dev/knowledge-base>.
 
 ## Releases
 
 The version number is not generated automatically and must be decided manually.
 We are using semantic versioning (ie: 2.3.2).
-```
+
+```bash
 make release tag=v<version_number>
-```
+```

devbox.json

@@ -0,0 +1,21 @@
+{
+  "$schema": "https://raw.githubusercontent.com/jetify-com/devbox/0.14.2/.schema/devbox.schema.json",
+  "packages": [
+    "kubernetes-helm@latest",
+    "[email protected]",
+    "git@latest",
+    "gnumake@latest",
+    "awscli2@latest",
+    "hugo@latest"
+  ],
+  "shell": {
+    "init_hook": [
+      "echo 'Welcome to devbox!' > /dev/null"
+    ],
+    "scripts": {
+      "test": [
+        "echo \"Error: no test specified\" && exit 1"
+      ]
+    }
+  }
+}