docs: add information for development

.devcontainer/Dockerfile

@@ -1,2 +1 @@
-ARG VARIANT="16"
-FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:0-${VARIANT}
+FROM mcr.microsoft.com/devcontainers/javascript-node:16

.env.example

@@ -1,21 +1,22 @@
-COMPOSE_PROJECT_NAME=thream-api
-NODE_ENV=development
 API_URL=http://localhost:8080
-HOST=0.0.0.0
-PORT=8080
+COMPOSE_PROJECT_NAME=thream-api
 DATABASE_URL=postgresql://user:password@thream-database:5432/thream
+DISCORD_CLIENT_ID=
+DISCORD_CLIENT_SECRET=
 EMAIL_HOST=thream-maildev
 EMAIL_PASSWORD=password
 EMAIL_PORT=25
 EMAIL_USER=no-reply@thream.fr
 FILE_UPLOADS_API_KEY=apiKeySecret
 FILE_UPLOADS_API_URL=http://host.docker.internal:8000
-DISCORD_CLIENT_ID=
-DISCORD_CLIENT_SECRET=
 GITHUB_CLIENT_ID=
 GITHUB_CLIENT_SECRET=
 GOOGLE_CLIENT_ID=
 GOOGLE_CLIENT_SECRET=
+HOST=0.0.0.0
 JWT_ACCESS_EXPIRES_IN=15 minutes
+# You can generate JWT secrets with the `npm run generate:jwt-secret` command.
 JWT_ACCESS_SECRET=accessTokenSecret
 JWT_REFRESH_SECRET=refreshTokenSecret
+NODE_ENV=development
+PORT=8080

CONTRIBUTING.md

@@ -58,9 +58,9 @@ Scopes define what part of the code changed.
 ### Examples
 
 ```sh
-git commit -m "feat(services): add POST /users/signup"
+git commit -m "feat: add POST /users/signup"
 git commit -m "docs(readme): update installation process"
-git commit -m "fix(services): should emit events to connected users"
+git commit -m "fix: should emit events to connected users"
 ```
 
 ## Directory Structure
@@ -120,3 +120,5 @@ The folders after `src/services` : is the real path of the routes in the API exc
 folders starting and ending with `__` like `__test__` or `__utils__`.
 
 The filenames correspond to the HTTP methods used (`get`, `post`, `put`, `delete`).
+
+You can generate the boilerplate code for a new service with the `npm run generate` command.