I’m trying to build a Docker container for my Go project using Docker Compose, but I’m running into an issue where Docker cannot find the auth-svc directory during the COPY step.

Here is my project structure:

/home/sohel/go/src/github.com/bizspace/
├── api-gateway
│   ├── deploy
│   │   └── Dockerfile
│   ├── ...
├── auth-svc
│   ├── deploy
│   │   └── Dockerfile
│   ├── ...
├── deploy
│   └── docker
│       ├── docker-compose.yml
│       └── postgres
│           └── init.sql
├── go.mod
├── go.sum

Dockerfile (auth-svc/deploy/Dockerfile):

# Build stage
FROM golang:1.22-alpine AS builder

WORKDIR /app

# Copy go.mod and go.sum from the project root
COPY go.mod go.sum ./

# Download all dependencies
RUN go mod download

# Copy the entire auth-svc directory
COPY auth-svc ./auth-svc

# Build the Go application
RUN CGO_ENABLED=0 GOOS=linux go build -o /bin/auth-svc ./auth-svc/cmd/main.go

# Final stage
FROM scratch
COPY --from=builder /bin/auth-svc /bin/auth-svc
ENTRYPOINT ["/bin/auth-svc"]

docker-compose.yml (deploy/docker/docker-compose.yml):

version: '3.8'

services:
  auth-svc:
    build:
      context: ../..
      dockerfile: auth-svc/deploy/Dockerfile
    container_name: auth-svc
    ports:
      - "8081:8081" # Adjust ports as necessary
    environment:
      - ENV_VAR=example_value # Add any necessary environment variables

  api-gateway:
    build:
      context: ../..
      dockerfile: api-gateway/deploy/Dockerfile
    container_name: api-gateway
    ports:
      - "8080:8080" # Adjust ports as necessary
    depends_on:
      - auth-svc
    environment:
      - ENV_VAR=example_value # Add any necessary environment variables

  postgres:
    image: postgres:latest
    container_name: postgres
    environment:
      POSTGRES_USER: user
      POSTGRES_PASSWORD: password
      POSTGRES_DB: mydatabase
    ports:
      - "5432:5432"
    volumes:
      - ./postgres/init.sql:/docker-entrypoint-initdb.d/init.sql

networks:
  default:
    driver: bridge

Error Message:

[+] Building 1.1s (9/11) docker:default
 => [auth-svc internal] load build definition from Dockerfile 0.0s
 => => transferring dockerfile: 495B 0.0s
 => [auth-svc internal] load metadata for docker.io/library/golang:1.22-alpine 1.0s
 => [auth-svc internal] load .dockerignore 0.0s
 => => transferring context: 777B 0.0s
 => [auth-svc builder 1/6] FROM docker.io/library/golang:1.22-alpine@sha256:8c9183f715b0b4eca05b8b3dbf59766aaedb41ec07477b132ee2891ac0110a07 0.0s
 => [auth-svc internal] load build context 0.0s
 => => transferring context: 54B 0.0s
 => CACHED [auth-svc builder 2/6] WORKDIR /app 0.0s
 => CACHED [auth-svc builder 3/6] COPY go.mod go.sum ./ 0.0s
 => CACHED [auth-svc builder 4/6] RUN go mod download 0.0s
 => ERROR [auth-svc builder 5/6] COPY auth-svc ./auth-svc 0.0s
------
 > [auth-svc builder 5/6] COPY auth-svc ./auth-svc:
------
failed to solve: failed to compute cache key: failed to calculate checksum of ref b3ad4ddd-1331-4638-81e6-5cd14faf3a25::z649uairbj5bqcw0v4kauu8gl: "/auth-svc": not found

Steps Taken:

Navigated to /home/sohel/go/src/github.com/bizspace/deploy/docker.
Ran the command docker-compose up --build.

Questions:

Why is Docker unable to find the auth-svc directory during the build process?
Is there an issue with how the build context is being set in my docker-compose.yml file?
How can I correctly set up the docker-compose.yml and Dockerfile to ensure the build succeeds?

Any help or insights would be greatly appreciated.
Thank you!