Convert to typescript

src/isDocker.ts

@@ -0,0 +1,22 @@
+import * as fs from 'fs'
+
+function hasDockerEnv(): boolean {
+  try {
+    fs.statSync('/.dockerenv')
+    return true
+  } catch (_) {
+    return false
+  }
+}
+
+function hasDockerCGroup(): boolean {
+  try {
+    return fs.readFileSync('/proc/self/cgroup', 'utf8').includes('docker')
+  } catch (_) {
+    return false
+  }
+}
+
+export function isDocker(): boolean {
+  return hasDockerEnv() || hasDockerCGroup()
+}