.travis.yml: added travis file.

.travis.yml

@@ -0,0 +1,12 @@
+dist: bionic
+
+language: bash
+
+services:
+  - docker
+
+script:
+  - docker login -u="$DOCKER_USER" -p="$DOCKER_PW" https://flotte-docker-registry.spdns.org/
+  - docker build -t flotte-user-managment .
+  - docker tag flotte-user-managment flotte-docker-registry.spdns.org/flotte-user-managment
+  - docker push flotte-docker-registry.spdns.org/flotte-user-managment:latest

README.md

@@ -1,5 +1,7 @@
 # fLotte User Management Server
 
+[![Build Status](https://travis-ci.com/flotte-goes-smart/flotte-user-management.svg?token=YfRmpHAXqyUafCgSEexw&branch=main)](https://travis-ci.com/flotte-goes-smart/flotte-user-management)
+
 ## Dev Requirements
 
 - a full rust toolchain installation (for example with [rustup](https://rustup.rs/))