build: refactor Dockerfile

Author: masontikhonov

installer-image/Dockerfile

@@ -1,21 +1,14 @@
-FROM octopusdeploy/dhi-golang:1.24-alpine3.23-dev AS go-build
+# syntax=docker/dockerfile:1
 
+FROM octopusdeploy/dhi-golang:1.24-alpine3.23-dev AS go-build
 RUN go install github.com/davidrjonas/semver-cli@latest \
   && cp $GOPATH/bin/semver-cli /usr/local/bin/
 
-#bookworm-slim
+# DHI source: https://hub.docker.com/repository/docker/octopusdeploy/dhi-debian-base/customizations/-1316986597936591264
 FROM octopusdeploy/dhi-debian-base:trixie_cf-gitops-runtime-installer-debian-13
-
-RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
-
 ARG CF_CLI_VERSION=v0.2.16
 ARG TARGETARCH
-
-RUN curl -L --output - https://github.com/codefresh-io/cli-v2/releases/download/${CF_CLI_VERSION}/cf-linux-${TARGETARCH}.tar.gz | tar zx && mv ./cf-linux-${TARGETARCH} /usr/local/bin/cf
-COPY --from=go-build /usr/local/bin/semver-cli /usr/local/bin/semver-cli
-
-COPY --from=bitnamilegacy/kubectl:1.33.4 /opt/bitnami/kubectl/bin/kubectl /usr/local/bin/
-
-RUN useradd -m -s /bin/bash codefresh
-USER codefresh
+ADD --unpack=true --chown=nonroot:nonroot --chmod=755 https://github.com/codefresh-io/cli-v2/releases/download/${CF_CLI_VERSION}/cf-linux-${TARGETARCH}.tar.gz /usr/local/bin/cf
+COPY --from=go-build --chown=nonroot:nonroot --chmod=755 /usr/local/bin/semver-cli /usr/local/bin/semver-cli
+USER nonroot
 WORKDIR /home/codefresh