Basic configuration of docker for go and mariadb

docker-compose.yml

version: '3.9'
services:
    webapi:
        build:
            context: .
            dockerfile: Dockerfile
        container_name: webapi
        restart: on-failure
        depends_on:
            - mariadb
        ports:
            - 8080:8080
    mariadb:
        image: mariadb
        container_name: mariadb
        environment:
            - MYSQL_ROOT_PASSWORD=1234
            - MYSQL_DATABASE=testdb
            - MYSQL_USER=kgh
            - MYSQL_PASSWORD=1234
        volumes:
            - database:/var/lib/mysql
        ports:
            - 3306:3306
volumes:
    api:
    database:

Dockerfile

# syntax=docker/dockerfile:1

FROM golang:alpine AS builder

RUN mkdir -p /go/src/app

WORKDIR /go/src/app
COPY . .

ENV CGO_ENABLED=0
RUN go get \
  && go mod download \ 
  && RUN go build -a -o webapi

FROM alpine

WORKDIR /app

COPY --from=builder /go/src/app/webapi /app/

ENV GO111MODULE="on"
ENV GIN_MODE="release"

EXPOSE 8080

CMD ["./webapi"]