Dockerfile

# Typical usage:
#   docker build --progress=plain --pull --rm -f "Dockerfile" -t schwarzlichtbezirk/slotopol:latest "."
#   docker run -d -p 8080:8080 schwarzlichtbezirk/slotopol

##
## Build stage
##

# Use image with golang last version as builder.
FROM golang:1.25-bookworm AS build

# Make project root folder as current dir.
WORKDIR /go/src/github.com/slotopol/server
# Copy only go.mod and go.sum to prevent downloads all dependencies again on any code changes.
COPY go.mod go.sum ./
# Download all dependencies pointed at go.mod file.
RUN go mod download
# Copy all files and subfolders in current state as is.
COPY . .

# Set executable rights to all shell-scripts.
RUN chmod +x ./task/*.sh
# Compile project for Linux amd64.
RUN ./task/build-docker.sh

##
## Deploy stage
##

# Thin deploy image.
FROM scratch

# Copy compiled executable and configuration files to new image destination.
COPY --from=build /go/bin /go/bin

# Open REST listen port.
EXPOSE 8080

# Run application with full path representation.
# Without shell to get signal for graceful shutdown.
ENTRYPOINT ["/go/bin/app"]
CMD ["-v", "web"]