Version:

• listmonk: latest (v4.1.0)
• OS: Arch Linux

Description of the bug and steps to reproduce:
The local development docker suite in /dev is outdated.

If you run make dev-docker, the backend won't be built successfully because go version is 1.17 in dev's Dockerfile.

Moreover, I was curious about current status of local dev suite in /dev now, because in the website, it doesn't even mention this suite.

Solution

• Upgrade go version to 1.20 in dev's Dockerfile
• Update website's description on developer setup (include the /dev suite)
• Add support for devcontainer for better development experience

Screenshots: