chore: set default flags in dockerfile

Dockerfile

@@ -17,9 +17,7 @@ RUN apk --no-cache add gcc musl-dev
 COPY . .
 COPY --from=frontend /frontend-build/dist ./server/dist
 
-RUN go build \
+RUN go build -o memos ./bin/server/main.go
-    -o memos \
-    ./bin/server/main.go
 
 # Make workspace with above generated files.
 FROM alpine:3.16.0 AS monolithic
@@ -30,4 +28,4 @@ COPY --from=backend /backend-build/memos /usr/local/memos/
 # Directory to store the data, which can be referenced as the mounting point.
 RUN mkdir -p /var/opt/memos
 
-ENTRYPOINT ["./memos"]
+ENTRYPOINT ["./memos", "--mode", "prod", "--port", "5230"]