The majority of this coastline spreads across the Arctics, so only Icebreakers can navigate there, the rest of its access to the ocean crosses other countries' territorial waters (Turkey and Japan for example) and can easily be blocked. Which is why Russia has never been a naval power.
Currently Russia doesn't have a singe reliable news source. We all have seen the pro-Russian narrative - there's no war, we're not murdering the civilians, all Ukrainians are nazis developing bioweapons targeting "slav DNA" and to be delivered across the border by birds, etc. Those are not news.
Needless to say that this propaganda also targets people in other countries with large ethnical Russian population, specifically the Baltic states and incites those people to riot and hate the land they live on creating a bridgehead for possible Russian invasion.
"some dependencies are only needed to build the image" - it's true if you don't write proper Dockerfiles. You're always free to build an app in a separate image, mark it with `AS build-env`, and then copy the result into an image containing an entrypoint with `COPY --from=build-env`, all within the same dockerfile.