fix: Build assets as part of Docker build

Dockerfile

@@ -1,4 +1,4 @@
-FROM elixir:1.8.0-alpine
+FROM elixir:1.8.0-alpine AS elixir1
 
 RUN apk add make gcc libc-dev
 
@@ -30,7 +30,21 @@ RUN mix deps.compile
 ADD ./script /root/app/script
 ADD ./apps /root/app/apps
 
-RUN mix phx.digest
 RUN MAKE=cmake mix compile
 
+FROM node:15.0
+
+WORKDIR /root/app/apps/app/assets/
+COPY --from=0 /root/app/apps/app/assets/ /root/app/apps/app/assets
+COPY --from=0 /root/app/deps/phoenix/ /root/app/apps/app/assets/node_modules/phoenix
+COPY --from=0 /root/app/deps/phoenix_html/ /root/app/apps/app/assets/node_modules/phoenix_html
+RUN npm install
+RUN npm run deploy
+
+FROM elixir1
+
+COPY --from=1 /root/app/apps/app/priv/static/ /root/app/apps/app/priv/static
+
+RUN mix phx.digest
+
 CMD ["mix", "phx.server"]

apps/app/assets/package.json

@@ -5,7 +5,6 @@
   "scripts": {
     "deploy": "webpack --mode production",
     "watch": "webpack --mode development --watch",
-    "preinstall": "npx npm-force-resolutions",
     "profile": "webpack --mode development --plugin webpack/lib/debug/ProfilingPlugin"
   },
   "dependencies": {

config/prod.exs

@@ -20,10 +20,15 @@ secret_key_base = System.get_env("SECRET_KEY_BASE")
 ]
 |> Enum.map(fn {otp_app, module, start_server} ->
   endpoint = Module.concat(module, "Endpoint")
+  extra_opts =
+    if start_server do
+      [cache_static_manifest: "priv/static/cache_manifest.json"]
+    else
+      []
+    end
 
-  config otp_app, endpoint,
+  config otp_app, endpoint, [
     url: [host: "example.com", port: 80],
-    cache_static_manifest: "priv/static/cache_manifest.json",
     http: [
       port: String.to_integer(System.get_env("PORT") || "4000"),
       transport_options: [socket_opts: [:inet6]]
@@ -32,6 +37,7 @@ secret_key_base = System.get_env("SECRET_KEY_BASE")
     pubsub_server: App.PubSub,
     live_view: [signing_salt: "g5ltUbnQ"],
     server: start_server
+  ] ++ extra_opts
 end)
 
 # ## Using releases (Elixir v1.9+)