Merge pull request #25 from protoconf/avivl/docker

Add Dockerfile for demoapp with multi-stage build

demoapp/Dockerfile

@@ -0,0 +1,36 @@
+
+FROM golang:1.22.4-alpine as builder
+# Set the Current Working Directory inside the container
+WORKDIR /go/src/protoconf/demoapp
+
+# 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 . .
+
+# Build the Go app
+RUN go build -o /go/bin/main . &&\
+    adduser -D -u 10001 demo
+# Start a new stage from scratch
+FROM scratch AS runtime
+
+# Set the Current Working Directory inside the container
+WORKDIR /root/
+
+COPY --from=builder /etc/passwd /etc/passwd
+
+USER 1001
+# Copy the Pre-built binary file from the previous stage
+COPY --from=builder /go/bin/main .
+
+COPY --from=builder /go/src/protoconf/demoapp/local/config.json /root/local/config.json
+
+# Expose port 8181 to the outside world
+EXPOSE 8181
+
+# Command to run the executable
+CMD ["./main"]