feat: use docker multi-stage build to eliminate dependencies on exter…

…nal environments

docker/Dockerfile

@@ -1,9 +1,25 @@
-FROM ubuntu:18.04
+FROM golang:alpine as go-builder
+
+RUN go env -w CGO_ENABLED=0
+
+WORKDIR /build
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+RUN go build -trimpath -ldflags '-extldflags "-static -fpic" -s -w' -o ./flydb-server cmd/server/cli/flydb-server.go
+
+FROM alpine:latest
 
 WORKDIR /app
 
-COPY bin/flydb-server /app/flydb-server
+COPY --from=go-builder /build/flydb-server /app/flydb-server
 
 RUN chmod +x /app/flydb-server
 
-CMD ["/app/flydb-server"]
+EXPOSE 8999
+
+ENTRYPOINT ["/app/flydb-server"]