Add container based dev flow (#4)

* add container based dev flow

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

* Fix yarn test for container based dev flow

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

* Update contributing guidelines and test workflow

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

Co-authored-by: CrazyMax <crazy-max@users.noreply.github.com>

src/docker.ts

@@ -0,0 +1,7 @@
+import * as exec from './exec';
+
+export async function isDaemonRunning(): Promise<boolean> {
+  return await exec.exec(`docker`, ['version', '--format', '{{.Server.Os}}'], true).then(res => {
+    return !res.stdout.includes(' ') && res.success;
+  });
+}