[bug] initium cli is always using the default unix socket

[LucaLanziani]

We need to make so initium will use the current context.

Initium is trying to use the default socket to connect to docker

> $ initium build                                                                                                                                                                                        ⬡ 19.0.0 [±main ✓]
Dockerfile Location: Dockerfile.initium
Building initium-nodejs-demo-app:latest
2023/09/27 14:47:57 FATA Failed to build docker image Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

docker instead as the rancher-desktop set as current context

lucalanziani@LUCAL-ITMAC22 ~/code/initium-nodejs-demo-app                                                                                                                                                        [14:48:06]
> $ docker context ls                                                                                                                                                                                    ⬡ 19.0.0 [±main ✓]
NAME                DESCRIPTION                               DOCKER ENDPOINT                                          ERROR
colima              colima                                    unix:///Users/lucalanziani/.colima/default/docker.sock   
default             Current DOCKER_HOST based configuration   unix:///var/run/docker.sock                              
rancher-desktop *   Rancher Desktop moby context              unix:///Users/lucalanziani/.rd/docker.sock               

We can force initium to use that conext setting the DOCKER_HOST environment variable

lucalanziani@LUCAL-ITMAC22 ~/code/initium-nodejs-demo-app                                                                                                                                                        [14:48:17]
> $ DOCKER_HOST=unix:///Users/lucalanziani/.rd/docker.sock initium build                                                                                                                                 ⬡ 19.0.0 [±main ✓]
Dockerfile Location: Dockerfile.initium
Building initium-nodejs-demo-app:latest
Step 1/10 : FROM node:20.2.0 AS build-env
20.2.0: Pulling from library/node
b04fae59f135: Pulling fs layer 
24cef00b9ad9: Pulling fs layer 
1db91b65282b: Pulling fs layer 
54db3e52d959: Waiting 
2b2d5a4c9703: Waiting 
c07b95efdf4b: Waiting 
c3f4f824faef: Waiting 
d39d890dd567: Waiting 

A better option is to have initium be aware of the current context