add docker and cicd

.drone.yml

@@ -0,0 +1,22 @@
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: build
+    image: golang
+    commands:
+      - CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-extldflags "-static"' .
+
+  - name: publish
+    image: techknowlogick/drone-docker:latest
+    privileged: true
+    settings:
+      repo: garionion/gitea-attachements-proxy
+      debug: true
+      password:
+        from_secret: docker_password
+      username:
+        from_secret: docker_username
+      tags:
+        - latest

Dockerfile

@@ -0,0 +1,9 @@
+FROM alpine:3.14.1 as alpine
+RUN apk add -U --no-cache ca-certificates
+FROM alpine:3.14.1
+EXPOSE 3000
+LABEL maintainer="dockerhub@enderware.de"
+ENV GODEBUG netdns=go
+COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+ADD gitea-attachements-proxy /bin/
+ENTRYPOINT ["/bin/gitea-attachements-proxy"]