Dockerfile.dev

# Development Dockerfile with live reload support
FROM golang:1.24-alpine

# Add build arguments for UID and GID to support different host users
# Note: UID 1000 matches the default first user on most Linux systems.
# If your host user has a different UID, you may need to rebuild with:
# docker build --build-arg USER_ID=$(id -u) --build-arg GROUP_ID=$(id -g) -f Dockerfile.dev .
ARG USER_ID=1000
ARG GROUP_ID=1000

# Install build dependencies for CGO and development tools
RUN apk add --no-cache gcc musl-dev git wget

# Install Air for live reload
RUN go install github.com/air-verse/air@v1.61.7

# Install Delve for debugging
RUN go install github.com/go-delve/delve/cmd/dlv@latest

# Create app directory and set ownership
# Critical Fix: chown -R /go ensures the maglev user can access the Go module cache volume
RUN mkdir -p /app/data && \
    addgroup -g ${GROUP_ID} maglev && \
    adduser -u ${USER_ID} -G maglev -s /bin/sh -D maglev && \
    chown -R maglev:maglev /app && \
    chown -R maglev:maglev /go

# Switch to non-root user
USER maglev

WORKDIR /app

# Copy dependency files first
COPY --chown=maglev:maglev go.mod go.sum ./
RUN --mount=type=cache,target=/go/pkg/mod,uid=1000,gid=1000 \
    go mod download

# Source code will be mounted via docker-compose volume
# This allows live reload without rebuilding the container

EXPOSE 4000 2345

# Default command uses Air for live reload
CMD ["air", "-c", ".air.docker.toml"]