Update .gitignore. Add basic auth support. Add README.

README.md

@@ -1,2 +1,50 @@
 # private-docker-registry
 Create your own private docker registry with ssl by letsencrypt and basic auth
+
+Official docs: [https://docs.docker.com/registry/deploying/](https://docs.docker.com/registry/deploying/)
+
+## Config it
+
+Before you can start registry service, you should make a little setup: config your **domain**, create **htpasswd** for auth
+
+### Domain name
+
+Open `docker-compose.yml` and replace `<your_domain>` and  `<your_email>` to your domain name and email.
+
+### Create a password file
+
+```
+mkdir auth
+docker run --entrypoint htpasswd registry:2 -Bbn testuser testpassword > auth/htpasswd
+```
+
+**Note:** do not use default login \ pass form example!
+
+## Up it
+
+Just up service:
+```
+docker-compose up
+```
+
+This configuration will get security cert automatically by [lets-nginx](https://github.com/smashwilson/lets-nginx). 
+It may take a bit of time. 
+
+## Use it
+
+Now you can login and try to upload some image into your private docker registry:
+```
+docker pull alpine
+docker tag alpine <your_domain>:5000/alpine
+docker login <your_domain>:5000
+
+    Username: testuser
+    Password: testpassword
+    Login Succeeded
+
+docker push <your_domain>:5000/alpine
+```
+
+## Contributing
+
+Bug reports, bug fixes, and new features are always welcome. Please open issues, and submit pull requests for any new code.