added dockerfile

docker/headscale.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+cd /build/headscale
+echo 'Writing config...'
+echo '''
+{
+    "server_url": "$SERVER_URL",
+    "listen_addr": "0.0.0.0:8000",
+    "private_key_path": "private.key",
+    "public_key_path": "public.key",
+    "db_host": "localhost",
+    "db_port": 5432,
+    "db_name": "headscale",
+    "db_user": "admin",
+    "db_pass": "$POSTGRES_PASSWORD"
+}
+''' > config.json
+
+# Wait until PostgreSQL started and listens on port 5432.
+while [ -z "`netstat -tln | grep 5432`" ]; do
+  echo 'Waiting for PostgreSQL to start ...'
+  sleep 1
+done
+echo 'PostgreSQL started.'
+
+# Start server.
+echo 'Starting server...'
+
+./headscale