Replace earthly with dockerfile (#28)

.dockerignore

@@ -9,6 +9,7 @@ build
 # Files not needed during builds
 .dockerignore
 .gitignore
+Dockerfile
 Earthfile
 **/*.md
 **/*.license

Dockerfile

@@ -0,0 +1,24 @@
+# SPDX-FileCopyrightText: 2023 Risk.Ident GmbH <[email protected]>
+#
+# SPDX-License-Identifier: CC0-1.0
+
+FROM golang:1.21.5-alpine AS build
+WORKDIR /jelease
+COPY go.mod go.sum ./
+RUN go mod download
+
+ARG VERSION=latest
+COPY . .
+RUN go test -v ./... \
+  && go build \
+    -ldflags "-X github.com/RiskIdent/jelease/cmd.appVersion=$VERSION" \
+    -o build/jelease main.go
+
+FROM alpine
+RUN apk add --no-cache ca-certificates git
+COPY --from=build /jelease/build/jelease /usr/local/bin/
+CMD ["jelease", "serve"]
+USER 10000
+LABEL org.opencontainers.image.source=https://github.com/RiskIdent/jelease
+LABEL org.opencontainers.image.description="Automatically create software update PRs and Jira tickets using newreleases.io webhooks."
+LABEL org.opencontainers.image.licenses=GPL-3.0-or-later

README.md

@@ -132,16 +132,15 @@ config file:
 
 ## Building the application and docker image
 
-The application uses [earthly](https://earthly.dev/get-earthly) for building
-and pushing a docker image.
-
-After installing earthly, the image can be built by running
-
 ```bash
-earhtly +docker
+VERSION=v0.4.1
+
+podman build -t ghcr.io/riskident/jelease:${VERSION} --build-arg VERSION=${VERSION}
+podman tag ghcr.io/riskident/jelease:{${VERSION},latest}
 
-# if you want to push a new image version
-earhtly --push +docker --VERSION=v0.4.1
+podman login ghcr.io
+podman push ghcr.io/riskident/jelease:${VERSION}
+podman push ghcr.io/riskident/jelease:latest
 ```
 
 You can also persist build flags in a `.env` file, e.g: