fix dockerfile

Author: Lgdev07

Dockerfile

@@ -2,20 +2,54 @@ FROM elixir:1.18.3-otp-27-slim AS base
 
 WORKDIR /code_comparison
 
-# Install system dependencies first!
 RUN apt-get update && \
-    apt-get install -y npm inotify-tools ca-certificates && \
+    apt-get install -y npm inotify-tools ca-certificates curl bash git && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-# Now it's safe to run mix commands
 RUN mix do local.hex --force, local.rebar --force
 
-# Copy the entire application
-COPY . .
+# -----------------
+# BUILD
+# -----------------
+FROM base AS build
 
-# Install Elixir dependencies
-RUN mix deps.get
+ARG MIX_ENV=prod
+ARG SECRET_KEY_BASE=dummy_secret
+ENV MIX_ENV=$MIX_ENV
+ENV SECRET_KEY_BASE=$SECRET_KEY_BASE
 
-# Install npm dependencies
-RUN cd assets && npm install
+COPY . ./
+
+# install application
+RUN mix do deps.get, compile
+
+# -----------------
+# RELEASE
+# -----------------
+FROM build AS release
+
+# Build static assets and digest them
+RUN npm install --prefix assets && npm run deploy --prefix assets && mix phx.digest
+
+# generate release executable
+RUN mix release
+
+# -----------------
+# PRODUCTION
+# -----------------
+FROM elixir:1.18.3-otp-27-slim AS production
+
+WORKDIR /code_comparison
+
+ARG MIX_ENV=prod
+
+# install dependencies
+RUN apt-get update && \
+    apt-get install -y ncurses-bin curl && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY --from=release /code_comparison/_build/$MIX_ENV/rel/code_comparison ./
+
+CMD ["bin/code_comparison", "start"]