add drone docker image build

.drone.yml

@@ -0,0 +1,19 @@
+---
+# SPDX-FileCopyrightText: WTF Kooperative eG <https://wtf-eg.de/>
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+kind: pipeline
+type: docker
+name: default
+
+- name: docker-publish
+  image: plugins/docker
+  settings:
+    registry: registry.wtf-eg.net
+    repo: registry.wtf-eg.net/ki-frontend
+    target: ki-frontend
+    auto_tag: true
+    username:
+      from_secret: "docker_username"
+    password:
+      from_secret: "docker_password"

Dockerfile

@@ -5,6 +5,6 @@ COPY . ./
 RUN npm ci && npm run build
 
 
-FROM nginx
+FROM nginx as ki-frontend
 
 COPY --from=builder /dist/ /usr/share/nginx/html/

README.md

@@ -36,7 +36,7 @@ VUE_APP_API_URL ist die Enviroment Variable mit der die Adresse der API übergeb
 ### Image bauen
 
 ```
-docker build --tag ki_frontend .
+docker build --target ki-frontend --tag ki_frontend .
 ```