Reworked dockerfile

Dockerfile

@@ -1,20 +1,31 @@
-# Use a base image with Bun installed
-FROM oven/bun:1
-
-# Set the working directory
-WORKDIR /app
-
-# Copy package.json and package-lock.json
-COPY package.json ./
-
-# Install dependencies
-RUN bun install
-
-# Copy the rest of the application code
+# use the official Bun image
+# see all versions at https://hub.docker.com/r/oven/bun/tags
+FROM oven/bun:1 AS base
+WORKDIR /usr/src/app
+
+# install dependencies into temp directory
+# this will cache them and speed up future builds
+FROM base AS install
+RUN mkdir -p /temp/dev
+COPY package.json bun.lockb /temp/dev/
+RUN cd /temp/dev && bun install --frozen-lockfile
+
+# install with --production (exclude devDependencies)
+RUN mkdir -p /temp/prod
+COPY package.json bun.lockb /temp/prod/
+RUN cd /temp/prod && bun install --frozen-lockfile --production
+
+# copy node_modules from temp directory
+# then copy all (non-ignored) project files into the image
+FROM base AS prerelease
+COPY --from=install /temp/dev/node_modules node_modules
 COPY . .
 
-# Expose the port that the app runs on
-EXPOSE 3000
+# copy production dependencies and source code into final image
+FROM base AS release
+COPY --from=install /temp/prod/node_modules node_modules
+COPY --from=prerelease /usr/src/app/index.ts .
+COPY --from=prerelease /usr/src/app/package.json .
 
 # Run bun:migration:drop if DB_DROP is set
 RUN if [ "$DB_DROP" = "true" ]; then bun run migration:drop; fi
@@ -28,6 +39,7 @@ RUN if [ "$DB_SEED" = "true" ]; then bun run migration:seed; fi
 # Run bun:migration:drop if DB_DROP is set
 RUN if [ "$DB_DROP" = "true" ]; then bun run migration:drop; fi
 
-
-# Command to run the application
-CMD ["bun", "dev"]
+# run the app
+USER bun
+EXPOSE 3000/tcp
+ENTRYPOINT [ "bun", "run", "index.ts" ]