⚡️(docker) separate deps y-webrtc-signaling

We separate the install part of the signaling server
from the frontend-dep stage. It will improve
the build time of both of them.

src/frontend/Dockerfile

@@ -1,15 +1,13 @@
-FROM node:20 as frontend-deps
+FROM node:20-alpine as frontend-deps-y-webrtc-signaling
 
 WORKDIR /home/frontend/
 
 COPY ./src/frontend/package.json ./package.json
 COPY ./src/frontend/yarn.lock ./yarn.lock
-COPY ./src/frontend/apps/impress/package.json ./apps/impress/package.json
 COPY ./src/frontend/apps/y-webrtc-signaling/package.json ./apps/y-webrtc-signaling/package.json
-COPY ./src/frontend/packages/i18n/package.json ./packages/i18n/package.json
 COPY ./src/frontend/packages/eslint-config-impress/package.json ./packages/eslint-config-impress/package.json
 
-RUN yarn install --frozen-lockfile
+RUN yarn install
 
 COPY ./src/frontend/ .
 
@@ -17,7 +15,7 @@ COPY ./src/frontend/ .
 COPY ./docker/files/usr/local/bin/entrypoint /usr/local/bin/entrypoint
 
 # ---- y-webrtc-signaling ----
-FROM frontend-deps as y-webrtc-signaling
+FROM frontend-deps-y-webrtc-signaling as y-webrtc-signaling
 
 WORKDIR /home/frontend/apps/y-webrtc-signaling
 RUN yarn build
@@ -30,6 +28,19 @@ ENTRYPOINT [ "/usr/local/bin/entrypoint" ]
 
 CMD ["yarn", "start"]
 
+FROM node:20-alpine as frontend-deps
+
+WORKDIR /home/frontend/
+
+COPY ./src/frontend/package.json ./package.json
+COPY ./src/frontend/yarn.lock ./yarn.lock
+COPY ./src/frontend/apps/impress/package.json ./apps/impress/package.json
+COPY ./src/frontend/packages/eslint-config-impress/package.json ./packages/eslint-config-impress/package.json
+
+RUN yarn install --frozen-lockfile
+
+COPY ./src/frontend/ .
+
 ### ---- Front-end builder image ----
 FROM frontend-deps as impress