add Dockerfile

Dockerfile

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+FROM golang:alpine as builder
+
+# Set the Current Working Directory inside the container
+WORKDIR /app
+
+# Copy go mod and sum files
+COPY go.mod go.sum ./
+
+# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
+RUN go mod download
+
+# Copy the source from the current directory to the Working Directory inside the container
+COPY . .
+RUN go build -o main .
+
+######## Start a new stage from scratch #######
+FROM alpine:latest
+
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /root/
+
+# Copy the Pre-built binary file from the previous stage
+COPY --from=builder /app/main .
+
+ENV MODE=production
+ENV GIN_MODE=release
+EXPOSE 8080
+
+ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.2.1/wait ./wait
+RUN chmod +x ./wait
+
+CMD ./wait && ./main