fix(docker): crash loop fallback и observer-web на IFT

fallback: default_type вне if-блока nginx. observer-web: Hex/deps.compile в образе, без dev-watchers в контейнере.

docker/ObserverWeb.Dockerfile

@@ -9,7 +9,7 @@ WORKDIR /app
 
 RUN git clone --depth 1 https://github.com/thiagoesteves/observer_web.git .
 
-RUN mix local.hex --force && mix local.rebar --force && mix deps.get
+RUN mix local.hex --force && mix local.rebar --force && mix deps.get && mix deps.compile
 
 COPY docker/observer_web/build-assets.config.exs config/build-assets.config.exs
 RUN printf '\nimport_config "build-assets.config.exs"\n' >> config/config.exs
@@ -30,10 +30,13 @@ RUN for i in 1 2 3 4 5; do \
       echo "apk retry $i/5..."; sleep 15; \
     done
 
+RUN mix local.hex --force && mix local.rebar --force
+
 WORKDIR /app
 COPY --from=builder /app /app
 COPY docker/observer_web/dev.exs ./dev.exs
 
 EXPOSE 4000
 
-CMD elixir --sname observer_web@observer_web --cookie eventhub_cookie -S mix run --no-halt dev.exs
+ENV RELEASE_COOKIE=eventhub_cookie
+CMD elixir --sname observer_web@observer_web --cookie "${RELEASE_COOKIE}" -S mix run --no-halt dev.exs