fix: build with Dockerfile

Dockerfile

@@ -1,11 +1,27 @@
-FROM alpine:latest
+# compile fx-core
+FROM golang:1.18.2-alpine3.16 as builder
+
+RUN apk add --no-cache git build-base linux-headers
+
+WORKDIR /app
+
+# download and cache go mod
+COPY ./go.* ./
+RUN go env -w GO111MODULE=on && go mod download
+
+COPY . .
+
+RUN make build
+
+# build fx-core
+FROM alpine:3.16
 
 WORKDIR root
 
-COPY ./build/bin/pundixd /usr/bin/pundixd
+COPY --from=builder /app/build/bin/pundixd /usr/bin/pundixd
 
-EXPOSE 26656/tcp 26657/tcp 26660/tcp 9090/tcp 1317/tcp
+EXPOSE 26656/tcp 26657/tcp 26660/tcp 9090/tcp 1317/tcp 8545/tcp 8546/tcp
 
 VOLUME ["/root"]
 
-ENTRYPOINT ["pundixd"]
+ENTRYPOINT ["pundixd"]