Add debug Docker image

docker/Dockerfile.debug

@@ -0,0 +1,48 @@
+# set app name
+ARG app=roulette
+
+# create build stage
+ARG TAG
+FROM --platform=$BUILDPLATFORM golang:$TAG AS build
+ARG app
+
+# install dependencies
+RUN apk add --update-cache git upx
+
+# clone
+RUN git clone https://git.seedno.de/seednode/$app /src/$app
+
+# build and compress the binary
+WORKDIR /src/$app
+ARG TARGETOS TARGETARCH
+RUN CGO_ENABLED=0 \
+    GOOS=$TARGETOS \
+    GOARCH=$TARGETARCH \
+    go build -trimpath -ldflags "-s -w" -o $app \
+    && upx --best --lzma $app \
+    && chmod 500 $app
+
+# set up final stage
+FROM --platform=$BUILDPLATFORM alpine:latest
+ARG app
+
+# copy in user info
+COPY --chown=root:root --chmod=0400 passwd /etc/passwd
+
+# run as nonroot
+USER nonroot
+
+# copy in binary
+COPY --from=build --chown=root:root --chmod=0005 /src/$app/$app /$app
+
+# copy in time zone info
+COPY --from=build --chown=root:root --chmod=0004 /usr/local/go/lib/time/zoneinfo.zip /
+
+# load time zone info
+ENV ZONEINFO=/zoneinfo.zip
+
+# listen on an unprivileged port
+EXPOSE 8080
+
+# run application
+ENTRYPOINT ["/bin/ash"]

docker/build.sh

@@ -37,3 +37,19 @@ docker buildx build --platform "${platforms}" \
                     $(if [ "${LATEST}" == "yes" ]; then echo "-t ${registry}/${image_name}:latest"; fi) \
                     -f Dockerfile . \
                     --push
+
+# copy debug image to local image repository
+docker buildx build \
+                    --build-arg TAG="${tag}" \
+                    -t "${registry}/${image_name}:${image_version}-debug" \
+                    $(if [ "${LATEST}" == "yes" ]; then echo "-t ${registry}/${image_name}:debug"; fi) \
+                    -f Dockerfile.debug	 . \
+                    --load
+
+# push debug image to remote registry
+docker buildx build --platform "${platforms}" \
+                    --build-arg TAG="${tag}" \
+                    -t "${registry}/${image_name}:${image_version}-debug" \
+                    $(if [ "${LATEST}" == "yes" ]; then echo "-t ${registry}/${image_name}:debug"; fi) \
+                    -f Dockerfile.debug . \
+                    --push