updated dockerfile to use node:16-alpine, which is way lighter than the previous image

.dockerignore

@@ -0,0 +1,3 @@
+node_modules
+.git
+yarn.lock

Dockerfile

@@ -1,14 +1,14 @@
-FROM node:16-bullseye
+FROM node:16-alpine
 
 WORKDIR /app
 
-COPY . .
-
-RUN rm -rf .git
+COPY package.json ./
 RUN yarn install
-RUN yarn build
 RUN yarn gatsby telemetry --disable
 
+COPY . ./
+RUN yarn build
+
 EXPOSE 9000
 
-CMD yarn serve -H 0.0.0.0 -p 9000
+CMD [ "yarn", "serve", "-H", "0.0.0.0", "-p", "9000" ]