chore: update Dockerfile

Dockerfile

@@ -1,5 +1,5 @@
 # Build frontend dist.
-FROM node:14.18.2-alpine3.14 AS frontend
+FROM node:16.15.1-bullseye AS frontend
 WORKDIR /frontend-build
 
 COPY ./web/ .
@@ -8,11 +8,9 @@ RUN yarn
 RUN yarn build
 
 # Build backend exec file.
-FROM golang:1.16.12-alpine3.15 AS backend
+FROM golang:1.18.3-bullseye AS backend
 WORKDIR /backend-build
 
-RUN apk --no-cache add gcc musl-dev
-
 COPY . .
 
 RUN go build \
@@ -20,7 +18,7 @@ RUN go build \
     ./bin/server/main.go
 
 # Make workspace with above generated files.
-FROM alpine:3.14.3 AS monolithic
+FROM alpine:3.16.0 AS monolithic
 WORKDIR /usr/local/memos
 
 COPY --from=backend /backend-build/memos /usr/local/memos/