first try

wagfarm-api/Dockerfile

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+# Use official Golang image
+FROM golang:1.20-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 are not changed
+RUN go mod download
+
+# Copy the source code into the container
+COPY src src
+
+# Build the Go app
+RUN go build -o main src
+
+# Start a new stage from a smaller image
+FROM alpine:latest  
+
+# Install required libraries
+RUN apk --no-cache add ca-certificates
+
+# Copy the pre-built binary file from the builder stage
+COPY --from=builder /app/main .
+
+# Expose the API port
+EXPOSE 8089
+
+# Run the Go app
+CMD ["./main"]