Simplify docs and remove Docker local setup (#4783)

Having 2 different dev setups caused confusion, let's remove the Docker
local setup and recommend people install yarn locally.

Also simplified some docs by merging pages together, the recommend
self-hosting option is now the docker-compose / to adapt the
docker-compose.

packages/twenty-docker/twenty-server/Dockerfile

@@ -0,0 +1,35 @@
+FROM node:18.16.0-alpine as twenty-server-build
+
+WORKDIR /app
+
+COPY ./package.json .
+COPY ./yarn.lock .
+COPY ./.yarnrc.yml .
+COPY ./tsconfig.base.json .
+COPY ./nx.json .
+COPY ./.yarn/releases /app/.yarn/releases
+COPY ./packages/twenty-emails /app/packages/twenty-emails
+COPY ./packages/twenty-server /app/packages/twenty-server
+RUN yarn
+
+RUN npx nx reset
+RUN npx nx run twenty-server:build
+RUN mv /app/packages/twenty-server/dist /app/packages/twenty-server/build
+RUN npx nx run twenty-server:build:packageJson
+RUN mv /app/packages/twenty-server/dist/package.json /app/packages/twenty-server/package.json
+RUN rm -rf /app/packages/twenty-server/dist
+RUN mv /app/packages/twenty-server/build /app/packages/twenty-server/dist
+
+WORKDIR /app
+RUN yarn workspaces focus --production twenty-emails twenty-server
+
+FROM node:18.17.1-alpine as twenty-server
+
+COPY --from=twenty-server-build /app /app
+
+WORKDIR /app/packages/twenty-server
+
+LABEL org.opencontainers.image.source=https://github.com/twentyhq/twenty
+LABEL org.opencontainers.image.description="This image provides a consistent and reproducible environment for the backend, ensuring it deploys faster and runs the same way regardless of the deployment environment."
+
+CMD ["node", "dist/src/main"]