update Dockerfile

Dockerfile

@@ -1,23 +1,29 @@
 ARG APP_PATH=/opt/outline
 
-FROM node:20-slim as base
+FROM node:20-slim AS base
 ARG APP_PATH
 WORKDIR $APP_PATH
 
 FROM base AS build
 COPY ./src/package.json ./src/yarn.lock ./
 COPY ./src/patches ./patches
+RUN apt-get update && \
+    apt-get install -y wget && \
+    rm -rf /var/lib/apt/lists/*
 RUN yarn install --no-optional --frozen-lockfile --network-timeout 1000000 && \
     yarn cache clean
 COPY src .
 COPY shared ./shared
+ARG CDN_URL
 RUN yarn build
 RUN rm -rf node_modules
 RUN yarn install --production=true --frozen-lockfile --network-timeout 1000000 && \
     yarn cache clean
+ENV PORT=3000
+HEALTHCHECK CMD wget -qO- http://localhost:${PORT}/_health | grep -q "OK" || exit 1
 
 FROM base AS release
-ENV NODE_ENV production
+ENV NODE_ENV=production
 COPY --from=build $APP_PATH/build ./build
 COPY --from=build $APP_PATH/server ./server
 COPY --from=build $APP_PATH/public ./public
@@ -29,11 +35,11 @@ RUN addgroup --gid 1001 nodejs && \
     chown -R nodejs:nodejs $APP_PATH/build && \
     mkdir -p /var/lib/outline && \
     chown -R nodejs:nodejs /var/lib/outline
-ENV FILE_STORAGE_LOCAL_ROOT_DIR /var/lib/outline/data
+ENV FILE_STORAGE_LOCAL_ROOT_DIR=/var/lib/outline/data
 RUN mkdir -p "$FILE_STORAGE_LOCAL_ROOT_DIR" && \
     chown -R nodejs:nodejs "$FILE_STORAGE_LOCAL_ROOT_DIR" && \
     chmod 1777 "$FILE_STORAGE_LOCAL_ROOT_DIR"
 VOLUME /var/lib/outline/data
 USER nodejs
 EXPOSE 3000
-CMD ["yarn", "start"]
+CMD ["yarn", "start"]