🔧(docker) frontend env build

Make the environment variables configurable
for the frontend app in the Dockerfile by setting
the arg variables.

src/frontend/Dockerfile

@@ -61,6 +61,15 @@ FROM impress as impress-builder
 
 WORKDIR /home/frontend/apps/impress
 
+ARG FRONTEND_THEME
+ENV NEXT_PUBLIC_THEME=${FRONTEND_THEME}
+
+ARG SIGNALING_URL
+ENV NEXT_PUBLIC_SIGNALING_URL=${SIGNALING_URL}
+
+ARG API_ORIGIN
+ENV NEXT_PUBLIC_API_ORIGIN=${API_ORIGIN}
+
 RUN yarn build
 
 # ---- Front-end image ----

src/frontend/apps/impress/.env

@@ -1 +1,3 @@
 NEXT_PUBLIC_THEME=dsfr
+NEXT_PUBLIC_SIGNALING_URL=
+NEXT_PUBLIC_API_ORIGIN=