feat(docker): Rework Dockerfile into layered installs and add tooling (tini, chromium, MongoDB); simplify Alpine CI image Python/pip setup; add tsdocker devDependency; remove npmextra push flag; update README and registry links

package.json

@@ -33,5 +33,8 @@
     "szci",
     "node version management",
     "typescript"
-  ]
+  ],
+  "devDependencies": {
+    "@git.zone/tsdocker": "^1.15.1"
+  }
 }