feat: add docker image, auto-built using CI

.dockerignore

@@ -0,0 +1,4 @@
+Dockerfile
+.dockerignore
+*.swp
+*.swo

.drone.yml

@@ -57,7 +57,25 @@ steps:
     depends_on:
       - fetch
     when:
-      event: tag
+
+  - name: publish image
+    image: plugins/docker
+    settings:
+      auto_tag: true
+      username: 3wordchant
+      password:
+        from_secret: git_coopcloud_tech_token_3wc
+      repo: git.coopcloud.tech/coop-cloud/abra
+      tags: latest
+    depends_on:
+      - run shellcheck
+      - run flake8
+      - run unit tests
+      - test installation script
+    when:
+      event:
+        exclude:
+          - pull_request
 
 volumes:
   - name: deps

Dockerfile

@@ -0,0 +1,21 @@
+FROM golang:1.18-alpine AS build
+
+ENV GOPRIVATE coopcloud.tech
+
+RUN apk add --no-cache make git gcc musl-dev
+
+COPY . /app
+
+WORKDIR /app
+
+RUN CGO_ENABLED=0 make build
+# RUN rm go.sum && go get -v -d -u ./... && \
+# 	make build
+
+RUN ls /app
+
+FROM scratch
+
+COPY --from=build /app/abra /abra
+
+ENTRYPOINT ["/abra"]