Use RUN --mount in Host build dockerfile

Signed-off-by: Boris Bera <bbera@coveo.com>

docs/deployment/docker.md

@@ -61,9 +61,10 @@ FROM node:16-bullseye-slim
 
 # Install sqlite3 dependencies. You can skip this if you don't use sqlite3 in the image,
 # in which case you should also move better-sqlite3 to "devDependencies" in package.json.
-RUN apt-get update && \
+RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
+    --mount=type=cache,target=/var/lib/apt,sharing=locked \
+    apt-get update && \
     apt-get install -y --no-install-recommends libsqlite3-dev python3 build-essential && \
-    rm -rf /var/lib/apt/lists/* && \
     yarn config set python /usr/bin/python3
 
 # From here on we use the least-privileged `node` user to run the backend.
@@ -79,7 +80,8 @@ ENV NODE_ENV production
 COPY --chown=node:node yarn.lock package.json packages/backend/dist/skeleton.tar.gz ./
 RUN tar xzf skeleton.tar.gz && rm skeleton.tar.gz
 
-RUN yarn install --frozen-lockfile --production --network-timeout 300000 && rm -rf "$(yarn cache dir)"
+RUN --mount=type=cache,target=/home/node/.cache/yarn,sharing=locked,uid=1000,gid=1000 \
+    yarn install --frozen-lockfile --production --network-timeout 300000
 
 # Then copy the rest of the backend bundle, along with any other files we might want.
 COPY --chown=node:node packages/backend/dist/bundle.tar.gz app-config*.yaml ./