Publish a dev docker image

It is build from the master branch.

.build.yml

@@ -1,5 +1,6 @@
 image: archlinux
 packages:
+    - docker
     - go
     - revive
     - staticcheck
@@ -20,3 +21,13 @@ tasks:
     - gofmt: |
           cd ntfy-alertmanager
           test -z $(gofmt -l .)
+    - dev-image: |
+          cd ntfy-alertmanager/docker
+          if [ "$BUILD_SUBMITTER" != "git.sr.ht" ] || [ "$(git rev-parse master)" != "$(git rev-parse HEAD)" ]
+          then
+              complete-build
+          fi
+          sudo systemctl start docker
+          ~/.local/bin/dockerhub_login
+          docker build -f Dockerfile-dev -t xenrox/ntfy-alertmanager:dev ./..
+          docker push xenrox/ntfy-alertmanager:dev

README.md

@@ -7,6 +7,8 @@ A bridge between ntfy and Alertmanager.
 ## Installation
 
 Simply use go build or the [docker image] with [docker-compose file].
+`ntfy-alertmanager:latest` is built from the latest tagged release while
+`ntfy-alertmanager:dev` is built from the master branch.
 
 ## Configuration
 

docker/Dockerfile-dev

@@ -0,0 +1,13 @@
+FROM golang:alpine as build
+WORKDIR /app
+
+COPY . .
+RUN go build -o /app/ntfy-alertmanager
+
+
+FROM alpine:latest
+WORKDIR /
+
+COPY --from=build /app/ntfy-alertmanager /ntfy-alertmanager
+
+ENTRYPOINT [ "./ntfy-alertmanager" ]