feat: refactor dockerfiles

* combine dev and prod into multi-stages dockerfile
* replace node with node:20-alpine to reduce image size

app/Dockerfile

@@ -1,5 +1,5 @@
-# Build stage
-FROM node as build-stage
+# Base stage
+FROM node:20-alpine as base
 WORKDIR /app
 COPY package.json yarn.lock ./
 COPY app/package.json ./app/package.json
@@ -7,14 +7,21 @@ COPY packages/file-graph/package.json ./packages/file-graph/package.json
 COPY packages/utils/package.json ./packages/utils/package.json
 RUN yarn install --frozen-lockfile
 
+# Dev stage
+FROM base as dev
+WORKDIR /app/app
+CMD [ "yarn", "dev:docker", "--host", "0.0.0.0" ]
+
+# Build stage
+FROM base as build
 COPY app ./app
 COPY packages/file-graph ./packages/file-graph
 COPY packages/utils ./packages/utils
 RUN yarn build
 
 # Production stage
-FROM nginx:stable-alpine as production-stage
-COPY --from=build-stage /app/app/dist /usr/share/nginx/html
+FROM nginx:stable-alpine as prod
+COPY --from=build /app/app/dist /usr/share/nginx/html
 COPY deployment/nginx.conf /etc/nginx/conf.d/default.conf
 EXPOSE 80
 CMD ["nginx", "-g", "daemon off;"]