# 2023-08-27

## HOWTO:
## debug image with local bash session:
##
##       docker run -it --entrypoint bash zogg/watchtower:latest

# --------------------------------------------------
# Intermediary Build
# --------------------------------------------------

FROM	containrrr/watchtower:latest as BUILD

# Arguments from Docker build
ARG     TARGETPLATFORM
ARG     TARGETOS
ARG     TARGETARCH
ARG     BUILDPLATFORM
ARG     BUILDOS
ARG     BUILDARCH
ARG     BUILDVARIANT
ARG     CONCURRENCY


# --------------------------------------------------
# Final Docker Image
# --------------------------------------------------

FROM	alpine:latest

# Arguments from Docker build
ARG     TARGETPLATFORM
ARG     TARGETOS
ARG     TARGETARCH
ARG     BUILDPLATFORM
ARG     BUILDOS
ARG     BUILDARCH
ARG     BUILDVARIANT
ARG     CONCURRENCY

# Update & upgrade APK + Install required packages
USER    root
WORKDIR /
RUN             apk add --no-cache wget bash

# Set bash as default shell interpreter
SHELL   ["/bin/bash", "-c"]

# Used by Docker build to set platform dependent variables
COPY    platform.sh .
RUN             chmod +x platform.sh \
        &&      ./platform.sh \
        &&      rm -rf platform.sh

# Copy necessary files
COPY    healthcheck.sh	                        /healthcheck

# Setup execution rights
RUN             chmod +x /healthcheck


USER    root
WORKDIR /

# Copy from build
COPY    --from=build    /.                                      /

# Disable Watchtower image check
LABEL   com.centurylinklabs.watchtower.enable   false

# Define author's informations
LABEL   org.opencontainers.image.title          "Watchtower Special Edition"
LABEL   author                                  "Olivier Le Bris"
LABEL   maintainer                              "tech@zogg.fr"
LABEL   org.opencontainers.image.source         "https://zogg.fr"
LABEL   org.opencontainers.image.licenses       MIT

ENTRYPOINT ["/watchtower"]