Explicitly mention Docker commands when building template (#586)

This PR improves CLI messaging when building sandbox templates. Now, the
used Docker commands are explicitly logged to the user like this:

```
Building docker image with the following command:
docker build . \ # <--- This log is new
   -f e2b.Dockerfile \
   --pull --platform linux/amd64 \
   -t docker.e2b.dev/e2b/custom-envs/vqwjjtzwfi59d1cwww1k:ec8a819a-9666-45df-997b-e181b9fe4224 

[+] Building 0.7s (5/5) FINISHED                                                                              docker:desktop-linux
 => [internal] load build definition from e2b.Dockerfile                                                                      0.0s
 => => transferring dockerfile: 149B                                                                                          0.0s
 => [internal] load metadata for docker.io/library/ubuntu:22.04 
```
and
```
Pushing docker image with the following command:
docker push docker.e2b.dev/e2b/custom-envs/vqwjjtzwfi59d1cwww1k:ec8a819a-9666-45df-997b-e181b9fe4224 # <--- This log is new

The push refers to repository [docker.e2b.dev/e2b/custom-envs/vqwjjtzwfi59d1cwww1k]
```

so the user can potentially debug some issues on their own.

.changeset/warm-grapes-applaud.md

@@ -0,0 +1,5 @@
+---
+'@e2b/cli': minor
+---
+
+Explicitly mention Docker commands when building template

packages/cli/src/commands/template/build.ts

@@ -92,15 +92,15 @@ async function triggerTemplateBuild(templateID: string, buildID: string) {
   for (let i = 0; i < maxRetries; i++) {
     try {
       res = await client.api.POST(
-          '/templates/{templateID}/builds/{buildID}',
-          {
-            params: {
-              path: {
-                templateID,
-                buildID,
-              },
+        '/templates/{templateID}/builds/{buildID}',
+        {
+          params: {
+            path: {
+              templateID,
+              buildID,
             },
-          }
+          },
+        }
       )
 
       break
@@ -350,14 +350,16 @@ export const buildCommand = new commander.Command('build')
         }
         process.stdout.write('\n')
 
-        console.log('Building docker image...')
-        const cmd = `docker build . -f ${dockerfileRelativePath} --pull --platform linux/amd64 -t docker.${
-          connectionConfig.domain
-        }/e2b/custom-envs/${templateID}:${template.buildID} ${Object.entries(
+        const cmd = `docker build . \\
+   -f ${dockerfileRelativePath} \\
+   --pull --platform linux/amd64 \\
+   -t docker.${connectionConfig.domain}/e2b/custom-envs/${templateID}:${template.buildID} ${Object.entries(
           dockerBuildArgs
         )
-          .map(([key, value]) => `--build-arg="${key}=${value}"`)
-          .join(' ')}`
+            .map(([key, value]) => `--build-arg="${key}=${value}"`)
+            .join(' \\ \n   ')}`
+        console.log(`Building docker image with the following command:\n${asBold(cmd)}\n`)
+
         child_process.execSync(cmd, {
           stdio: 'inherit',
           cwd: root,
@@ -366,12 +368,13 @@ export const buildCommand = new commander.Command('build')
             DOCKER_CLI_HINTS: 'false',
           },
         })
-        console.log('Docker image built.\n')
+        console.log('> Docker image built.\n')
 
-        console.log('Pushing docker image...')
+        const pushCmd = `docker push docker.${connectionConfig.domain}/e2b/custom-envs/${templateID}:${template.buildID}`
+        console.log(`Pushing docker image with the following command:\n${asBold(pushCmd)}\n`)
         try {
           child_process.execSync(
-            `docker push docker.${connectionConfig.domain}/e2b/custom-envs/${templateID}:${template.buildID}`,
+            pushCmd,
             {
               stdio: 'inherit',
               cwd: root,
@@ -386,13 +389,13 @@ export const buildCommand = new commander.Command('build')
             root
           )
         }
-        console.log('Docker image pushed.\n')
+        console.log('> Docker image pushed.\n')
 
         console.log('Triggering build...')
         await triggerBuild(templateID, template.buildID)
 
         console.log(
-          `Triggered build for the sandbox template ${asFormattedSandboxTemplate(
+          `> Triggered build for the sandbox template ${asFormattedSandboxTemplate(
             template
           )} `
         )
@@ -443,16 +446,14 @@ async function waitForBuildFinish(
 sandbox = Sandbox("${aliases?.length ? aliases[0] : template.templateID}")
 
 # Create async sandbox
-sandbox = await AsyncSandbox.create("${
-          aliases?.length ? aliases[0] : template.templateID
-        }")`)
+sandbox = await AsyncSandbox.create("${aliases?.length ? aliases[0] : template.templateID
+          }")`)
 
         const typescriptExample = asTypescript(`import { Sandbox } from 'e2b'
 
 // Create sandbox
-const sandbox = await Sandbox.create('${
-          aliases?.length ? aliases[0] : template.templateID
-        }')`)
+const sandbox = await Sandbox.create('${aliases?.length ? aliases[0] : template.templateID
+          }')`)
 
         const examplesMessage = `You can now use the template to create custom sandboxes.\nLearn more on ${asPrimary(
           'https://e2b.dev/docs'