Fix Docker build by using pre-bundled vendor assets

- Add new mix alias 'assets.deploy.prod' that skips vendor bundling
- Copy pre-bundled vendor.js and vendor.css files in Dockerfile
- Prevents esbuild errors when npm packages aren't available during build

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -50,8 +50,12 @@ COPY priv/gleam priv/gleam
 # Compile Gleam files (using pre-compiled BEAM files)
 RUN mix gleam_compile
 
-# Compile assets
-RUN mix assets.deploy
+# Copy pre-bundled vendor assets
+COPY priv/static/assets/vendor.js priv/static/assets/
+COPY priv/static/assets/vendor.css priv/static/assets/
+
+# Compile assets (using prod alias that skips vendor bundling)
+RUN mix assets.deploy.prod
 
 # Compile and release
 RUN mix release --path /app/release

mix.exs

@@ -138,6 +138,11 @@ defmodule Aprsme.MixProject do
         "esbuild vendor",
         "esbuild default --minify",
         "phx.digest"
+      ],
+      "assets.deploy.prod": [
+        "tailwind default --minify",
+        "esbuild default --minify",
+        "phx.digest"
       ]
     ]
   end