Initial commit

Dockerfile.ci

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+# This is an alternative Dockerfile 
+# that aims to be used in the CI pipeline.
+# In this version we assume that the app have been build (yarn build that generate ./build/)
+# prior and archived into a build.tar file present in the context.
+# We do do that because 
+# 1) We want to avoid building the app twice, one for the docker image and one for the theme .tar
+# 2) If we use keycloakify --external-assets we have to generate the theme from the build/ directory
+# that is going to be in production. (CRA generates hashes, every build is different, even if the code is the same)
+
+# build environment
+FROM alpine as build
+WORKDIR /app
+#We use ADD instead of COPY because build/ is in .dockerignore
+ADD build.tar .
+COPY nginx.conf .
+
+# production environment (copy pasted from ./Dockerfile)
+FROM nginx:stable-alpine
+COPY --from=build /app/build /usr/share/nginx/html
+COPY --from=build /app/nginx.conf /etc/nginx/conf.d/default.conf
+CMD nginx -g 'daemon off;'