Docker compose for ngx admin

### Issue type

**I'm submitting a ...** (check one with "x")

* [ ] bug report
* [ x] feature request
* [ ] question about the decisions made in the repository

### Issue description
Is possible to dockerize with composer actual ngx-admin?
Any docker file proposed in previous issues looks don't work with actual version.
**Current behavior:**

**Expected behavior:**

**Steps to reproduce:**

**Related code:**

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### Other information:

**npm, node, OS, Browser**
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**Angular, Nebular**
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